<emd xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" emdb_id="EMD-2207" version="3.0.1.1" xsi:schemaLocation="https://github.com/emdb-empiar/emdb-schemas/blob/master/v3/v3_0_1_1/emdb_relaxed.xsd">
   <admin>
      <current_status>
         <code>REL</code>
         <processing_site>PDBe</processing_site>
      </current_status>
      <sites>
         <deposition>PDBe</deposition>
         <last_processing>PDBe</last_processing>
      </sites>
      <key_dates>
         <deposition>2012-09-19</deposition>
         <header_release>2012-10-10</header_release>
         <map_release>2012-12-05</map_release>
         <update>2013-01-09</update>
      </key_dates>
      <title>Negative stained electron microscopy reconstruction of the viral polymerase of influenza A virus ribonucleoprotein isolated from virions. Conformation 1.</title>
      <authors_list>
         <author>Arranz R</author>
         <author>Coloma R</author>
         <author>Chichon FJ</author>
         <author>Conesa JJ</author>
         <author>Carrascosa JL</author>
         <author>Valpuesta JM</author>
         <author>Ortin J</author>
         <author>Martin-Benito J</author>
      </authors_list>
      <keywords>Influenza, ribonucleoprotein, polymerase, RNA polymerase, nucleoprotein, negative stained electron microscopy, RNA.</keywords>
   </admin>
   <crossreferences>
      <citation_list>
         <primary_citation>
            <journal_citation published="true">
               <author order="1">Arranz R</author>
               <author order="2">Coloma R</author>
               <author order="3">Chichon FJ</author>
               <author order="4">Conesa JJ</author>
               <author order="5">Carrascosa JL</author>
               <author order="6">Valpuesta JM</author>
               <author order="7">Ortin J</author>
               <author order="8">Martin-Benito J</author>
               <title>The structure of native influenza virion ribonucleoproteins.</title>
               <journal>SCIENCE</journal>
               <volume>338</volume>
               <first_page>1634</first_page>
               <last_page>1637</last_page>
               <year>2012</year>
               <external_references type="PUBMED">23180776</external_references>
               <external_references type="DOI">doi:10.1126/science.1228172</external_references>
            </journal_citation>
         </primary_citation>
      </citation_list>
   </crossreferences>
   <sample>
      <name>Native influenza A virus ribonucleoprotein (STRAIN A/WSN/33, H1N1). Polymerase end. Conformation 1.</name>
      <supramolecule_list>
         <sample_supramolecule supramolecule_id="1000">
            <name>Native influenza A virus ribonucleoprotein (STRAIN A/WSN/33, H1N1). Polymerase end. Conformation 1.</name>
            <number_unique_components>5</number_unique_components>
         </sample_supramolecule>
      </supramolecule_list>
      <macromolecule_list>
         <protein_or_peptide macromolecule_id="1">
            <name synonym="PB1">PB1</name>
            <natural_source database="NCBI">
               <organism ncbi="11320">Influenza A virus</organism>
               <strain>A/WSN/33 (H1N1)</strain>
            </natural_source>
            <molecular_weight>
               <experimental units="MDa">0.086</experimental>
               <theoretical units="MDa">0.086</theoretical>
            </molecular_weight>
            <number_of_copies>1</number_of_copies>
            <recombinant_exp_flag>false</recombinant_exp_flag>
            <recombinant_expression database="NCBI">
               </recombinant_expression>
            <sequence>
               </sequence>
         </protein_or_peptide>
         <protein_or_peptide macromolecule_id="2">
            <name synonym="PA">PA</name>
            <natural_source database="NCBI">
               <organism ncbi="11320">Influenza A virus</organism>
               <strain>A/WSN/33 (H1N1)</strain>
            </natural_source>
            <molecular_weight>
               <experimental units="MDa">0.083</experimental>
               <theoretical units="MDa">0.083</theoretical>
            </molecular_weight>
            <number_of_copies>1</number_of_copies>
            <recombinant_exp_flag>false</recombinant_exp_flag>
            <recombinant_expression database="NCBI">
               </recombinant_expression>
            <sequence>
               </sequence>
         </protein_or_peptide>
         <protein_or_peptide macromolecule_id="3">
            <name synonym="PB2">PB2</name>
            <natural_source database="NCBI">
               <organism ncbi="11320">Influenza A virus</organism>
               <strain>A/WSN/33 (H1N1)</strain>
            </natural_source>
            <molecular_weight>
               <experimental units="MDa">0.086</experimental>
               <theoretical units="MDa">0.086</theoretical>
            </molecular_weight>
            <number_of_copies>1</number_of_copies>
            <recombinant_exp_flag>false</recombinant_exp_flag>
            <recombinant_expression database="NCBI">
               </recombinant_expression>
            <sequence>
               </sequence>
         </protein_or_peptide>
         <protein_or_peptide macromolecule_id="4">
            <name synonym="nucleoprotein">nucleoprotein</name>
            <natural_source database="NCBI">
               <organism ncbi="11320">Influenza A virus</organism>
               <strain>A/WSN/33 (H1N1)</strain>
            </natural_source>
            <molecular_weight>
               <theoretical units="MDa">0.056</theoretical>
            </molecular_weight>
            <recombinant_exp_flag>false</recombinant_exp_flag>
            <recombinant_expression database="NCBI">
               </recombinant_expression>
            <sequence>
               </sequence>
         </protein_or_peptide>
         <rna macromolecule_id="5">
            <name synonym="RNA">RNA</name>
            <natural_source database="NCBI">
               <organism ncbi="11320">Influenza A virus</organism>
            </natural_source>
            <classification>OTHER</classification>
            <structure>SINGLE STRANDED</structure>
            <synthetic_flag>false</synthetic_flag>
         </rna>
      </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">
               <buffer>
                  <ph>8.0</ph>
                  <details>50mM Tris-HCl, 100mM KCl, 5mM MgCl2, 0.5% Igepal, 150mM imidazole</details>
               </buffer>
               <staining>
                  <type>NEGATIVE</type>
                  <details>Samples were applied to one side of a carbon coated Cu/Rh grid and stained on 2% w/v uranyl acetate for 90 seconds.</details>
               </staining>
               <grid>
                  <details>Freshly carbon coated, glow discharged for 15 seconds.</details>
               </grid>
               <vitrification>
                  <cryogen_name>NONE</cryogen_name>
                  <instrument>OTHER</instrument>
               </vitrification>
            </single_particle_preparation>
         </specimen_preparation_list>
         <microscopy_list>
            <single_particle_microscopy microscopy_id="1">
               <microscope>FEI TECNAI F20</microscope>
               <illumination_mode>FLOOD BEAM</illumination_mode>
               <imaging_mode>BRIGHT FIELD</imaging_mode>
               <electron_source>FIELD EMISSION GUN</electron_source>
               <acceleration_voltage units="kV">200</acceleration_voltage>
               <nominal_cs units="mm">2.26</nominal_cs>
               <nominal_defocus_min units="&#181;m">1.5</nominal_defocus_min>
               <nominal_defocus_max units="&#181;m">3.5</nominal_defocus_max>
               <nominal_magnification>65000.0</nominal_magnification>
               <specimen_holder_model>OTHER</specimen_holder_model>
               <date>2011-05-01</date>
               <image_recording_list>
                  <image_recording>
                     <film_or_detector_model category="CCD">FEI EAGLE (4k x 4k)</film_or_detector_model>
                     <digitization_details>
                        <sampling_interval units="&#181;m">15</sampling_interval>
                     </digitization_details>
                     <number_real_images>1024</number_real_images>
                     <details>downsampling factor 2.</details>
                     <bits_per_pixel>16.</bits_per_pixel>
                  </image_recording>
               </image_recording_list>
            </single_particle_microscopy>
         </microscopy_list>
         <singleparticle_processing image_processing_id="1">
            <ctf_correction>
               <details>Each plate</details>
            </ctf_correction>
            <final_reconstruction>
               <applied_symmetry>
                  <point_group>C1</point_group>
               </applied_symmetry>
               <algorithm>OTHER</algorithm>
               <resolution res_type="BY AUTHOR" units="&#8491;">20.0</resolution>
               <resolution_method>FSC 0.33 CUT-OFF</resolution_method>
               <software_list>
                  <software>
                     <name>XMIPP</name>
                  </software>
               </software_list>
               <number_images_used>7074</number_images_used>
            </final_reconstruction>
         </singleparticle_processing>
      </structure_determination>
   </structure_determination_list>
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         <a units="&#8491;">271.36</a>
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