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        <key_dates>
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            <header_release>2024-01-10</header_release>
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            <update>2024-03-06</update>
        </key_dates>
        <grant_support>
            <grant_reference>
                <funding_body>Biotechnology and Biological Sciences Research Council (BBSRC)</funding_body>
                <code>EP/V051474/1</code>
                <country>United Kingdom</country>
            </grant_reference>
            <grant_reference>
                <funding_body>Medical Research Council (MRC, United Kingdom)</funding_body>
                <code>MC UP 1201/31</code>
                <country>United Kingdom</country>
            </grant_reference>
            <grant_reference>
                <funding_body>Human Frontier Science Program (HFSP)</funding_body>
                <code>RGY0074/2021</code>
                <country>France</country>
            </grant_reference>
            <grant_reference>
                <funding_body>Engineering and Physical Sciences Research Council</funding_body>
                <code>EP/V026623/1</code>
                <country>United Kingdom</country>
            </grant_reference>
            <grant_reference>
                <funding_body>The Vallee Foundation Inc.</funding_body>
                <country>United States</country>
            </grant_reference>
            <grant_reference>
                <funding_body>European Molecular Biology Organization (EMBO)</funding_body>
                <country>European Union</country>
            </grant_reference>
            <grant_reference>
                <funding_body>Leverhulme Trust</funding_body>
                <country>United Kingdom</country>
            </grant_reference>
            <grant_reference>
                <funding_body>The Lister Institute of Preventive Medicine</funding_body>
                <country>United Kingdom</country>
            </grant_reference>
            <grant_reference>
                <funding_body>Wellcome Trust</funding_body>
                <code>104633/Z/14/Z</code>
                <country>United Kingdom</country>
            </grant_reference>
            <grant_reference>
                <funding_body>Royal Society</funding_body>
                <code>NIF/R1/192285</code>
                <country>United Kingdom</country>
            </grant_reference>
        </grant_support>
        <title>ESIBD structure of beta-galactosidase</title>
        <authors_list>
            <author>Esser T</author>
            <author>Boehning J</author>
            <author>Bharat TAM</author>
            <author>Rauschenbach S</author>
        </authors_list>
        <keywords>Lactase, Beta-galactosidase, cryo-EM, native MS, HYDROLASE</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author ORCID="0000-0002-1174-4131" order="1">Esser TK</author>
                    <author ORCID="0000-0002-6242-1041" order="2">Bohning J</author>
                    <author ORCID="0009-0009-7528-3870" order="3">Onur A</author>
                    <author ORCID="0000-0002-6193-1277" order="4">Chinthapalli DK</author>
                    <author ORCID="0009-0000-1149-6118" order="5">Eriksson L</author>
                    <author ORCID="0000-0002-2550-637X" order="6">Grabarics M</author>
                    <author ORCID="0000-0002-1052-3783" order="7">Fremdling P</author>
                    <author order="8">Konijnenberg A</author>
                    <author ORCID="0000-0002-7046-6709" order="9">Makarov A</author>
                    <author ORCID="0000-0002-6603-5295" order="10">Botman A</author>
                    <author ORCID="0000-0002-1471-5440" order="11">Peter C</author>
                    <author ORCID="0000-0002-1507-3742" order="12">Benesch JLP</author>
                    <author ORCID="0000-0001-7829-5505" order="13">Robinson CV</author>
                    <author ORCID="0000-0001-7686-2983" order="14">Gault J</author>
                    <author ORCID="0000-0001-9578-4263" order="15">Baker L</author>
                    <author ORCID="0000-0002-0168-0277" order="16">Bharat TAM</author>
                    <author ORCID="0000-0001-9382-1948" order="17">Rauschenbach S</author>
                    <title>Cryo-EM of soft-landed beta-galactosidase: Gas-phase and native structures are remarkably similar.</title>
                    <journal_abbreviation>Sci Adv</journal_abbreviation>
                    <country>US</country>
                    <volume>10</volume>
                    <first_page>eadl4628</first_page>
                    <last_page>eadl4628</last_page>
                    <year>2024</year>
                    <external_references type="PUBMED">38354247</external_references>
                    <external_references type="DOI">doi:10.1126/sciadv.adl4628</external_references>
                    <external_references type="ISSN">2375-2548</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
        <pdb_list>
            <pdb_reference>
                <pdb_id>8q7y</pdb_id>
                <relationship>
                    <in_frame>FULLOVERLAP</in_frame>
                </relationship>
            </pdb_reference>
        </pdb_list>
    </crossreferences>
    <sample>
        <name>Beta-galactosidase from E. coli; tetrameric complex</name>
        <supramolecule_list>
            <complex_supramolecule supramolecule_id="1">
                <name>Beta-galactosidase from E. coli; tetrameric complex</name>
                <parent>0</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>1</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <details>Sigma Aldrich Product Number G3153</details>
                <natural_source database="NCBI">
                    <organism ncbi="562">Escherichia coli</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.465</theoretical>
                </molecular_weight>
            </complex_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <protein_or_peptide macromolecule_id="1">
                <name>Beta-galactosidase</name>
                <natural_source database="NCBI">
                    <organism ncbi="83333">Escherichia coli K-12</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.1165725</theoretical>
                </molecular_weight>
                <number_of_copies>4</number_of_copies>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="83333">Escherichia coli K-12</recombinant_organism>
                </recombinant_expression>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MTMITDSLAVVLQRRDWENPGVTQLNRLAAHPPFASWRNSEEARTDRPSQQLRSLNGEWRFAWFPAPEAVPESWLECDLP
EADTVVVPSNWQMHGYDAPIYTNVTYPITVNPPFVPTENPTGCYSLTFNVDESWLQEGQTRIIFDGVNSAFHLWCNGRWV
GYGQDSRLPSEFDLSAFLRAGENRLAVMVLRWSDGSYLEDQDMWRMSGIFRDVSLLHKPTTQISDFHVATRFNDDFSRAV
LEAEVQMCGELRDYLRVTVSLWQGETQVASGTAPFGGEIIDERGGYADRVTLRLNVENPKLWSAEIPNLYRAVVELHTAD
GTLIEAEACDVGFRVVRIENGLLLLNGKPLLIRGVNRHEHHPLHGQVMDEQTMVQDILLMKQNNFNAVRCSHYPNHPLWY
TLCDRYGLYVVDEANIETHGMVPMNRLTDDPRWLPAMSERVTRMVQRDRNHPSVIIWSLGNESGHGANHDALYRWIKSVD
PSRPVQYEGGGADTTATDIICPMYARVDEDQPFPAVPKWSIKKWLSLPGETRPLILCEYAHAMGNSLGGFAKYWQAFRQY
PRLQGGFVWDWVDQSLIKYDENGNPWSAYGGDFGDTPNDRQFCMNGLVFADRTPHPALTEAKHQQQFFQFRLSGQTIEVT
SEYLFRHSDNELLHWMVALDGKPLASGEVPLDVAPQGKQLIELPELPQPESAGQLWLTVRVVQPNATAWSEAGHISAWQQ
WRLAENLSVTLPAASHAIPHLTTSEMDFCIELGNKRWQFNRQSGFLSQMWIGDKKQLLTPLRDQFTRAPLDNDIGVSEAT
RIDPNAWVERWKAAGHYQAEAALLQCTADTLADAVLITTAHAWQHQGKTLFISRKTYRIDGSGQMAITVDVEVASDTPHP
ARIGLNCQLAQVAERVNWLGLGPQENYPDRLTAACFDRWDLPLSDMYTPYVFPSENGLRCGTRELNYGPHQWRGDFQFNI
SRYSQQQLMETSHRHLLHAEEGTWLNIDGFHMGIGGDDSWSPSVSAEFQLSAGRYHYQLVWCQK</string>
                    <external_references type="UNIPROTKB">P00722</external_references>
                </sequence>
            </protein_or_peptide>
        </macromolecule_list>
    </sample>
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            <method>singleParticle</method>
            <aggregation_state>particle</aggregation_state>
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                    <buffer>
                        <ph>6.9</ph>
                        <details>Soft-landed sample</details>
                    </buffer>
                    <grid>
                        <model>Quantifoil R2/1</model>
                        <material>COPPER</material>
                        <mesh>400</mesh>
                        <support_film film_type_id="1">
                            <film_material>CARBON</film_material>
                            <film_topology>HOLEY</film_topology>
                        </support_film>
                    </grid>
                    <vitrification>
                        <cryogen_name>OTHER</cryogen_name>
                        <details>Soft-landed as described in manuscript. </details>
                    </vitrification>
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                    <microscope>FEI TITAN KRIOS</microscope>
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                    <imaging_mode>BRIGHT FIELD</imaging_mode>
                    <electron_source>FIELD EMISSION GUN</electron_source>
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                    <specimen_holder_model>FEI TITAN KRIOS AUTOGRID HOLDER</specimen_holder_model>
                    <cooling_holder_cryogen>NITROGEN</cooling_holder_cryogen>
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                        <coma_free/>
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                            <name>GIF Bioquantum</name>
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                        <image_recording image_recording_id="1">
                            <film_or_detector_model>GATAN K3 (6k x 4k)</film_or_detector_model>
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                            <average_electron_dose_per_image units="e/Å^2">34.0</average_electron_dose_per_image>
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                    <details>Ab-initio model generated in cryoSPARC</details>
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                        <point_group>D2</point_group>
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                        <software>
                            <name>cryoSPARC</name>
                            <processing_details>Non-uniform refinement</processing_details>
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