<?xml version="1.0" encoding="UTF-8"?>
<emd xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="https://ftp.ebi.ac.uk/pub/databases/em_ebi/emdb_related/emdb-schemas/emdb_schemas/v3/v3_0_9_3/emdb.xsd" version="3.0.9.3" emdb_id="EMD-31305">
    <admin>
        <current_status>
            <date>2024-06-05</date>
            <code>REL</code>
            <processing_site>PDBj</processing_site>
        </current_status>
        <sites>
            <deposition>PDBj</deposition>
            <last_processing>PDBj</last_processing>
        </sites>
        <key_dates>
            <deposition>2021-05-15</deposition>
            <header_release>2021-12-29</header_release>
            <map_release>2021-12-29</map_release>
            <update>2024-06-05</update>
        </key_dates>
        <grant_support>
            <grant_reference>
                <funding_body>National Natural Science Foundation of China (NSFC)</funding_body>
                <code>31822001</code>
                <country>China</country>
            </grant_reference>
        </grant_support>
        <title>The cryo-EM structure of A. thaliana Pol IV-RDR2 backtracked complex</title>
        <authors_list>
            <author>Fang CL</author>
            <author>Wu XX</author>
        </authors_list>
        <keywords>DNA-directed RNA polymerase IV, RNA- dependent RNA polymerase 2, RNA-directed DNA methylation pathway, TRANSCRIPTION</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author order="1">Huang K</author>
                    <author order="2">Wu XX</author>
                    <author order="3">Fang CL</author>
                    <author order="4">Xu ZG</author>
                    <author order="5">Zhang HW</author>
                    <author order="6">Gao J</author>
                    <author order="7">Zhou CM</author>
                    <author order="8">You LL</author>
                    <author order="9">Gu ZX</author>
                    <author order="10">Mu WH</author>
                    <author order="11">Feng Y</author>
                    <author order="12">Wang JW</author>
                    <author order="13">Zhang Y</author>
                    <title>Pol IV and RDR2: A two-RNA-polymerase machine that produces double-stranded RNA.</title>
                    <journal_abbreviation>Science</journal_abbreviation>
                    <country>US</country>
                    <volume>374</volume>
                    <first_page>1579</first_page>
                    <last_page>1586</last_page>
                    <year>2021</year>
                    <external_references type="PUBMED">34941388</external_references>
                    <external_references type="DOI">doi:10.1126/science.abj9184</external_references>
                    <external_references type="ISSN">1095-9203</external_references>
                    <external_references type="CSD">0038</external_references>
                    <external_references type="ASTM">SCIEAS</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
        <pdb_list>
            <pdb_reference>
                <pdb_id>7eu0</pdb_id>
                <relationship>
                    <in_frame>FULLOVERLAP</in_frame>
                </relationship>
            </pdb_reference>
        </pdb_list>
    </crossreferences>
    <sample>
        <name>A. thaliana Pol IV-RDR2 backtracked complex</name>
        <supramolecule_list>
            <complex_supramolecule supramolecule_id="1">
                <name>A. thaliana Pol IV-RDR2 backtracked complex</name>
                <parent>0</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>1</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>2</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>3</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>4</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>5</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>6</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>7</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>8</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>9</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>10</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>11</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>12</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>13</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>14</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>15</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <natural_source database="NCBI">
                    <organism ncbi="3702">Arabidopsis thaliana</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.55</theoretical>
                </molecular_weight>
            </complex_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <protein_or_peptide macromolecule_id="1">
                <name>DNA-directed RNA polymerase IV subunit 1</name>
                <natural_source database="NCBI">
                    <organism ncbi="3702">Arabidopsis thaliana</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.16953528099999998</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MEDDCEELQVPVGTLTSIGFSISNNNDRDKMSVLEVEAPNQVTDSRLGLPNPDSVCRTCGSKDRKVCEGHFGVINFAYSI
INPYFLKEVAALLNKICPGCKYIRKKQFQITEDQPERCRYCTLNTGYPLMKFRVTTKEVFRRSGIVVEVNEESLMKLKKR
GVLTLPPDYWSFLPQDSNIDESCLKPTRRIITHAQVYALLLGIDQRLIKKDIPMFNSLGLTSFPVTPNGYRVTEIVHQFN
GARLIFDERTRIYKKLVGFEGNTLELSSRVMECMQYSRLFSETVSSSKDSANPYQKKSDTPKLCGLRFMKDVLLGKRSDH
TFRTVVVGDPSLKLNEIGIPESIAKRLQVSEHLNQCNKERLVTSFVPTLLDNKEMHVRRGDRLVAIQVNDLQTGDKIFRS
LMDGDTVLMNRPPSIHQHSLIAMTVRILPTTSVVSLNPICCLPFRGDFDGDCLHGYVPQSIQAKVELDELVALDKQLINR
QNGRNLLSLGQDSLTAAYLVNVEKNCYLNRAQMQQLQMYCPFQLPPPAIIKASPSSTEPQWTGMQLFGMLFPPGFDYTYP
LNNVVVSNGELLSFSEGSAWLRDGEGNFIERLLKHDKGKVLDIIYSAQEMLSQWLLMRGLSVSLADLYLSSDLQSRKNLT
EEISYGLREAEQVCNKQQLMVESWRDFLAVNGEDKEEDSVSDLARFCYERQKSATLSELAVSAFKDAYRDVQALAYRYGD
QSNSFLIMSKAGSKGNIGKLVQHSMCIGLQNSAVSLSFGFPRELTCAAWNDPNSPLRGAKGKDSTTTESYVPYGVIENSF
LTGLNPLESFVHSVTSRDSSFSGNADLPGTLSRRLMFFMRDIYAAYDGTVRNSFGNQLVQFTYETDGPVEDITGEALGSL
SACALSEAAYSALDQPISLLETSPLLNLKNVLECGSKKGQREQTMSLYLSEYLSKKKHGFEYGSLEIKNHLEKLSFSEIV
STSMIIFSPSSNTKVPLSPWVCHFHISEKVLKRKQLSAESVVSSLNEQYKSRNRELKLDIVDLDIQNTNHCSSDDQAMKD
DNVCITVTVVEASKHSVLELDAIRLVLIPFLLDSPVKGDQGIKKVNILWTDRPKAPKRNGNHLAGELYLKVTMYGDRGKR
NCWTALLETCLPIMDMIDWGRSHPDNIRQCCSVYGIDAGRSIFVANLESAVSDTGKEILREHLLLVADSLSVTGEFVALN
AKGWSKQRQVESTPAPFTQACFSSPSQCFLKAAKEGVRDDLQGSIDALAWGKVPGFGTGDQFEIIISPKVHGFTTPVDVY
DLLSSTKTMRRTNSAPKSDKATVQPFGLLHSAFLKDIKVLDGKGIPMSLLRTIFTWKNIELLSQSLKRILHSYEINELLN
ERDEGLVKMVLQLHPNSVEKIGPGVKGIRVAKSKHGDSCCFEVVRIDGTFEDFSYHKCVLGATKIIAPKKMNFYKSKYLK
NGTLESGGFSENPGSGSGSDYKDHDGDYKDHDIDYKDDDDKENLYFQGHHHHHHHHHHSSNFPDRSNIWQ</string>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="2">
                <name>DNA-directed RNA polymerases IV and V subunit 2</name>
                <natural_source database="NCBI">
                    <organism ncbi="3702">Arabidopsis thaliana</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.132848047</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MPDMDIDVKDLEEFEATTGEINLSELGEGFLQSFCKKAATSFFDKYGLISHQLNSYNYFIEHGLQNVFQSFGEMLVEPSF
DVVKKKDNDWRYATVKFGEVTVEKPTFFSDDKELEFLPWHARLQNMTYSARIKVNVQVEVFKNTVVKSDKFKTGQDNYVE
KKILDVKKQDILIGSIPVMVKSILCKTSEKGKENCKKGDCAFDQGGYFVIKGAEKVFIAQEQMCTKRLWISNSPWTVSFR
SENKRNRFIVRLSENEKAEDYKRREKVLTVYFLSTEIPVWLLFFALGVSSDKEAMDLIAFDGDDASITNSLIASIHVADA
VCEAFRCGNNALTYVEQQIKSTKFPPAESVDECLHLYLFPGLQSLKKKARFLGYMVKCLLNSYAGKRKCENRDSFRNKRI
ELAGELLEREIRVHLAHARRKMTRAMQKHLSGDGDLKPIEHYLDASVITNGLSRAFSTGAWSHPFRKMERVSGVVANLGR
ANPLQTLIDLRRTRQQVLYTGKVGDARYPHPSHWGRVCFLSTPDGENCGLVKNMSLLGLVSTQSLESVVEKLFACGMEEL
MDDTCTPLFGKHKVLLNGDWVGLCADSESFVAELKSRRRQSELPREMEIKRDKDDNEVRIFTDAGRLLRPLLVVENLQKL
KQEKPSQYPFDHLLDHGILELIGIEEEEDCNTAWGIKQLLKEPKIYTHCELDLSFLLGVSCAVVPFANHDHGRRVLYQSQ
KHCQQAIGFSSTNPNIRCDTLSQQLFYPQKPLFKTLASECLKKEVLFNGQNAIVAVNVHLGYNQEDSIVMNKASLERGMF
RSEQIRSYKAEVDAKDSEKRKKMDELVQFGKTHSKIGKVDSLEDDGFPFIGANMSTGDIVIGRCTESGADHSIKLKHTER
GIVQKVVLSSNDEGKNFAAVSLRQVRSPCLGDKFSSMHGQKGVLGYLEEQQNFPFTIQGIVPDIVINPHAFPSRQTPGQL
LEAALSKGIACPIQKEGSSAAYTKLTRHATPFSTPGVTEITEQLHRAGFSRWGNERVYNGRSGEMMRSMIFMGPTFYQRL
VHMSEDKVKFRNTGPVHPLTRQPVADRKRFGGIKFGEMERDCLIAHGASANLHERLFTLSDSSQMHICRKCKTYANVIER
TPSSGRKIRGPYCRVCVSSDHVVRVYVPYGAKLLCQELFSMGITLNFDTKLC</string>
                    <external_references type="UNIPROTKB">Q9LK40</external_references>
                </sequence>
                <ec_number>2.7.7.6</ec_number>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="3">
                <name>DNA-directed RNA polymerases II, IV and V subunit 3</name>
                <natural_source database="NCBI">
                    <organism ncbi="3702">Arabidopsis thaliana</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.035503218999999996</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MDGATYQRFPKIKIRELKDDYAKFELRETDVSMANALRRVMISEVPTVAIDLVEIEVNSSVLNDEFIAHRLGLIPLTSER
AMSMRFSRDCDACDGDGQCEFCSVEFRLSSKCVTDQTLDVTSRDLYSADPTVTPVDFTIDSSVSDSSEHKGIIIVKLRRG
QELKLRAIARKGIGKDHAKWSPAATVTFMYEPDIIINEDMMDTLSDEEKIDLIESSPTKVFGMDPVTRQVVVVDPEAYTY
DEEVIKKAEAMGKPGLIEISPKDDSFIFTVESTGAVKASQLVLNAIDLLKQKLDAVRLSDDTVEADDQFGELGAHMRGG</string>
                    <external_references type="UNIPROTKB">Q39211</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="4">
                <name>DNA-directed RNA polymerases II and IV subunit 5A</name>
                <natural_source database="NCBI">
                    <organism ncbi="3702">Arabidopsis thaliana</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.024340388999999997</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MLTEEELKRLYRIQKTLMQMLRDRGYFIADSELTMTKQQFIRKHGDNMKREDLVTLKAKRNDNSDQLYIFFPDEAKVGVK
TMKMYTNRMKSENVFRAILVVQQNLTPFARTCISEISSKFHLEVFQEAEMLVNIKEHVLVPEHQVLTTEEKKTLLERYTV
KETQLPRIQVTDPIARYFGLKRGQVVKIIRPSETAGRYVTYRYVV</string>
                    <external_references type="UNIPROTKB">O81098</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="5">
                <name>DNA-directed RNA polymerases II, IV and V subunit 6A</name>
                <natural_source database="NCBI">
                    <organism ncbi="3702">Arabidopsis thaliana</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.016670346</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MADEDYNDVDDLGYEDEPAEPEIEEGVEEDVEMKENDDVNGEPIEAEDKVETEPVQRPRKTSKFMTKYERARILGTRALQ
ISMNAPVMVELEGETDPLEIAMKELRQRKIPFTIRRYLPDGSFEEWGVDELIVEDSWKRQVGGD</string>
                    <external_references type="UNIPROTKB">Q9FJ98</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="6">
                <name>DNA-directed RNA polymerases II, IV and V subunit 8B</name>
                <natural_source database="NCBI">
                    <organism ncbi="3702">Arabidopsis thaliana</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.016626298999999997</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MASNIIMFEDIFVVDKLDPDGKKFDKVTRVEARSHNLEMFMHLDVNTEVYPLAVGDKFTLAMAPTLNLDGTPDTGYFTPG
AKKTLADKYEYIMHGKLYKISERDGKTPKAELYVSFGGLLMLLQGDPAHISHFELDQRLFLLMRKL</string>
                    <external_references type="UNIPROTKB">Q9M1A8</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="7">
                <name>DNA-directed RNA polymerases II, IV and V subunit 9A</name>
                <natural_source database="NCBI">
                    <organism ncbi="3702">Arabidopsis thaliana</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.013297145</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MSTMKFCRECNNILYPKEDKEQKILLYACRNCDHQEVADNSCVYRNEVHHSVSERTQILTDVASDPTLPRTKAVRCSKCQ
HREAVFFQATARGEEGMTLFFVCCNPNCGHRWRE</string>
                    <external_references type="UNIPROTKB">Q6NLH0</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="8">
                <name>DNA-directed RNA polymerases II, IV and V subunit 10</name>
                <natural_source database="NCBI">
                    <organism ncbi="3702">Arabidopsis thaliana</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.00832369</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MIIPVRCFTCGKVIGNKWDQYLDLLQLDYTEGDALDALQLVRYCCRRMLMTHVDLIEKLLNYNTLEKSDNS</string>
                    <external_references type="UNIPROTKB">Q8LFJ6</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="9">
                <name>DNA-directed RNA polymerases II, IV and V subunit 11</name>
                <natural_source database="NCBI">
                    <organism ncbi="3702">Arabidopsis thaliana</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.013582285999999999</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MNAPERYERFVVPEGTKKVSYDRDTKIINAASFTVEREDHTIGNIVRMQLHRDENVLFAGYQLPHPLKYKIIVRIHTTSQ
SSPMQAYNQAINDLDKELDYLKNQFEAEVAKFSNQF</string>
                    <external_references type="UNIPROTKB">Q38859</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="10">
                <name>DNA-directed RNA polymerases II, IV and V subunit 12</name>
                <natural_source database="NCBI">
                    <organism ncbi="3702">Arabidopsis thaliana</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.005905768</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MDPAPEPVTYVCGDCGQENTLKSGDVIQCRECGYRILYKKRTRRVVQYEAR</string>
                    <external_references type="UNIPROTKB">Q9FLM8</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="11">
                <name>RNA-dependent RNA polymerase 2</name>
                <natural_source database="NCBI">
                    <organism ncbi="3702">Arabidopsis thaliana</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.129494531</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MVSETTTNRSTVKISNVPQTIVADELLRFLELHLGEDTVFALEIPTTRDNWKPRDFARVQFTTLEVKSRAQLLSSQSKLL
FKTHNLRLSEAYDDIIPRPVDPRKRLDDIVLTVGFPESDEKRFCALEKWDGVRCWILTEKRRVEFWVWESGDCYKIEVRF
EDIIETLSCCVNGDASEIDAFLLKLKYGPKVFKRVTVHIATKFKSDRYRFCKEDFDFMWIRTTDFSGSKSIGTSTCFCLE
VHNGSTMLDIFSGLPYYREDTLSLTYVDGKTFASAAQIVPLLNAAILGLEFPYEILFQLNALVHAQKISLFAASDMELIK
ILRGMSLETALVILKKLHQQSSICYDPVFFVKTQMQSVVKKMKHSPASAYKRLTEQNIMSCQRAYVTPSKIYLLGPELET
ANYVVKNFAEHVSDFMRVTFVEEDWSKLPANALSVNSKEGYFVKPSRTNIYNRVLSILGEGITVGPKRFEFLAFSASQLR
GNSVWMFASNEKVKAEDIREWMGCFRKIRSISKCAARMGQLFSASRQTLIVRAQDVEQIPDIEVTTDGADYCFSDGIGKI
SLAFAKQVAQKCGLSHVPSAFQIRYGGYKGVIAVDRSSFRKLSLRDSMLKFDSNNRMLNVTRWTESMPCFLNREIICLLS
TLGIEDAMFEAMQAVHLSMLGNMLEDRDAALNVLQKLSGENSKNLLVKMLLQGYAPSSEPYLSMMLRVHHESQLSELKSR
CRILVPKGRILIGCMDEMGILEYGQVYVRVTLTKAELKSRDQSYFRKIDEETSVVIGKVVVTKNPCLHPGDIRVLDAIYE
VHFEEKGYLDCIIFPQKGERPHPNECSGGDLDGDQFFVSWDEKIIPSEMDPPMDYAGSRPRLMDHDVTLEEIHKFFVDYM
ISDTLGVISTAHLVHADRDPEKARSQKCLELANLHSRAVDFAKTGAPAEMPYALKPREFPDFLERFEKPTYISESVFGKL
YRAVKSSLAQRKPEAESEDTVAYDVTLEEAGFESFIETAKAHRDMYGEKLTSLMIYYGAANEEEILTGILKTKEMYLARD
NRRYGDMKDRITLSVKDLHKEAMGWFEKSCEDEQQKKKLASAWYYVTYNPNHRDEKLTFLSFPWIVGDVLLDIKAENAQR
QSVEEKTSGLVSI</string>
                    <external_references type="UNIPROTKB">O82504</external_references>
                </sequence>
                <ec_number>2.7.7.48</ec_number>
            </protein_or_peptide>
            <dna macromolecule_id="12">
                <name>DNA (5'-D(*CP*TP*GP*TP*GP*CP*TP*TP*AP*TP*CP*GP*GP*TP*AP*GP*AP*GP*TP*G)-3')</name>
                <natural_source database="NCBI">
                    <organism ncbi="32630">synthetic construct</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.006196</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <sequence>
                    <string>(DC)(DT)(DG)(DT)(DG)(DC)(DT)(DT)(DA)(DT)(DC)(DG)(DG)(DT)(DA)(DG)(DA)(DG)(DT)(DG)</string>
                </sequence>
                <classification>DNA</classification>
            </dna>
            <rna macromolecule_id="13">
                <name>RNA (39-MER)</name>
                <natural_source database="NCBI">
                    <organism ncbi="32630">synthetic construct</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.01221502</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <sequence>
                    <string>UUUUAUCGAGAGGUACUUUUCUUUUCUUUCUUCUUCGGU</string>
                </sequence>
            </rna>
            <dna macromolecule_id="14">
                <name>DNA (33-MER)</name>
                <natural_source database="NCBI">
                    <organism ncbi="32630">synthetic construct</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.009954427</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <sequence>
                    <string>(DC)(DA)(DC)(DT)(DC)(DT)(DA)(DC)(DC)(DG)(DA)(DT)(DA)(DA)(DG)(DC)(DA)(DC)(DA)(DC)
(DG)(DT)(DA)(DC)(DC)(DT)(DC)(DT)(DC)(DC)(DT)(DA)(DT)</string>
                </sequence>
                <classification>DNA</classification>
            </dna>
            <rna macromolecule_id="15">
                <name>RNA (5'-R(*CP*CP*GP*A)-3')</name>
                <natural_source database="NCBI">
                    <organism ncbi="32630">synthetic construct</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.001239818</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <sequence>
                    <string>CCGA</string>
                </sequence>
            </rna>
            <ligand macromolecule_id="16">
                <name>ZINC ION</name>
                <molecular_weight>
                    <theoretical units="MDa">6.5409e-05</theoretical>
                </molecular_weight>
                <number_of_copies>8</number_of_copies>
                <formula>ZN</formula>
            </ligand>
            <ligand macromolecule_id="17">
                <name>MAGNESIUM ION</name>
                <molecular_weight>
                    <theoretical units="MDa">2.4305e-05</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <formula>MG</formula>
            </ligand>
        </macromolecule_list>
    </sample>
    <structure_determination_list>
        <structure_determination structure_determination_id="1">
            <method>singleParticle</method>
            <aggregation_state>particle</aggregation_state>
            <specimen_preparation_list>
                <single_particle_preparation preparation_id="1">
                    <concentration units="mg/mL">1.1</concentration>
                    <buffer>
                        <ph>7.5</ph>
                        <component>
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