<emd xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" emdb_id="EMD-2864" 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>2008-08-22</deposition>
         <header_release>2008-08-26</header_release>
         <map_release>2009-08-27</map_release>
         <update>2015-07-08</update>
      </key_dates>
      <title>Vitrified IAS Env</title>
      <authors_list>
         <author>Wu S-R</author>
         <author>Sjoberg M</author>
         <author>Wallin M</author>
         <author>Lindqvist B</author>
         <author>Ekstrom M</author>
         <author>Hebert H</author>
         <author>Koeck P</author>
         <author>Garoff H</author>
      </authors_list>
      <keywords>Cryo-electron microscopy,Env trimers,image processing,isomerization arrested state,receptor binding domain</keywords>
   </admin>
   <crossreferences>
      <citation_list>
         <primary_citation>
            <journal_citation published="true">
               <author order="1">Wu SR</author>
               <author order="2">Sjoeberg M</author>
               <author order="3">Wallin M</author>
               <author order="4">Lindqvist B</author>
               <author order="5">Ekstroem M</author>
               <author order="6">Hebert H</author>
               <author order="7">Koeck PJ</author>
               <author order="8">Garoff H</author>
               <title>Turning of the receptor-binding domains opens up the murine leukaemia virus Env for membrane fusion.</title>
               <journal>EMBO J.</journal>
               <volume>27</volume>
               <first_page>2799</first_page>
               <last_page>2808</last_page>
               <year>2008</year>
               <external_references type="PUBMED">18800055</external_references>
               <external_references type="DOI">doi:10.1038/emboj.2008.187</external_references>
            </journal_citation>
         </primary_citation>
      </citation_list>
      <emdb_list>
         <emdb_reference>
            <emdb_id>EMD-2863</emdb_id>
            <relationship>
               <in_frame>FULLOVERLAP</in_frame>
            </relationship>
         </emdb_reference>
      </emdb_list>
   </crossreferences>
   <sample>
      <name>Moloney mouse leukemia virus Env</name>
      <supramolecule_list>
         <sample_supramolecule supramolecule_id="1000">
            <name>Moloney mouse leukemia virus Env</name>
            <oligomeric_state>Trimer</oligomeric_state>
            <number_unique_components>1</number_unique_components>
            <molecular_weight>
               <experimental units="MDa">0.2</experimental>
               <method>Gel electrophoresis</method>
            </molecular_weight>
         </sample_supramolecule>
      </supramolecule_list>
      <macromolecule_list>
         <protein_or_peptide macromolecule_id="1">
            <name synonym="Mo-MLV Env">Moloney murine leukemia virus</name>
            <natural_source database="NCBI">
               <organism ncbi="11801">Moloney murine leukemia virus</organism>
               <tissue>Virus</tissue>
               <cell>MOV-3, NIH 3T3</cell>
            </natural_source>
            <molecular_weight>
               <experimental units="MDa">0.2</experimental>
            </molecular_weight>
            <number_of_copies>3</number_of_copies>
            <oligomeric_state>Trimer</oligomeric_state>
            <recombinant_exp_flag>true</recombinant_exp_flag>
            <recombinant_expression database="NCBI">
               </recombinant_expression>
            <sequence>
               </sequence>
         </protein_or_peptide>
      </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>7.4</ph>
                  <details>20 mM HEPES, 135 mM NaCl, pH 7.45, 10mM EDTA, 0.15 % Triton X-100, 12 % (w/w) sucrose</details>
               </buffer>
               <staining>
                  <type>NEGATIVE</type>
                  <details>No staining</details>
               </staining>
               <grid>
                  <details>400 mesh grid</details>
               </grid>
               <vitrification>
                  <cryogen_name>ETHANE</cryogen_name>
                  <chamber_humidity units="percentage">99</chamber_humidity>
                  <chamber_temperature units="K">77</chamber_temperature>
                  <instrument>OTHER</instrument>
                  <details>Vitrification instrument: Vitrobot</details>
                  <method>Blot for 3 seconds twice before plunging</method>
               </vitrification>
            </single_particle_preparation>
         </specimen_preparation_list>
         <microscopy_list>
            <single_particle_microscopy microscopy_id="1">
               <microscope>FEI TECNAI F20</microscope>
               <illumination_mode>SPOT SCAN</illumination_mode>
               <imaging_mode>BRIGHT FIELD</imaging_mode>
               <electron_source>FIELD EMISSION GUN</electron_source>
               <acceleration_voltage units="kV">300</acceleration_voltage>
               <nominal_cs units="mm">2</nominal_cs>
               <nominal_defocus_min units="&#181;m">2.5</nominal_defocus_min>
               <nominal_defocus_max units="&#181;m">3.5</nominal_defocus_max>
               <nominal_magnification>86000.0</nominal_magnification>
               <specimen_holder_model>GATAN LIQUID NITROGEN</specimen_holder_model>
               <temperature>
                  <temperature_min units="K">93</temperature_min>
                  <temperature_max units="K">96</temperature_max>
                  <temperature_average units="K">95</temperature_average>
               </temperature>
               <alignment_procedure>
                  <legacy>
                     <astigmatism>Objective lens astigmatism was corrected using online FFT</astigmatism>
                  </legacy>
               </alignment_procedure>
               <date>2008-05-10</date>
               <image_recording_list>
                  <image_recording>
                     <film_or_detector_model category="CCD">GENERIC CCD</film_or_detector_model>
                     <digitization_details>
                        <sampling_interval units="&#181;m">30</sampling_interval>
                     </digitization_details>
                     <number_real_images>96</number_real_images>
                     <average_electron_dose_per_image units="e/&#8491;^2">9</average_electron_dose_per_image>
                     <bits_per_pixel>8.</bits_per_pixel>
                  </image_recording>
               </image_recording_list>
               <specimen_holder>Eucentric</specimen_holder>
               <tilt_angle_min>0</tilt_angle_min>
               <tilt_angle_max>0</tilt_angle_max>
            </single_particle_microscopy>
         </microscopy_list>
         <singleparticle_processing image_processing_id="1">
            <ctf_correction>
               <details>Each particle</details>
            </ctf_correction>
            <final_reconstruction>
               <applied_symmetry>
                  <point_group>C3</point_group>
               </applied_symmetry>
               <algorithm>OTHER</algorithm>
               <resolution res_type="BY AUTHOR" units="&#8491;">19.0</resolution>
               <resolution_method>FSC 0.5 CUT-OFF</resolution_method>
               <software_list>
                  <software>
                     <name>EMAN</name>
                  </software>
               </software_list>
               <number_images_used>6787</number_images_used>
            </final_reconstruction>
            <final_two_d_classification>
               <number_classes>131</number_classes>
            </final_two_d_classification>
         </singleparticle_processing>
      </structure_determination>
   </structure_determination_list>
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      <file>emd_2864.map.gz</file>
      <symmetry>
         <space_group>1</space_group>
      </symmetry>
      <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
      <dimensions>
         <col>48</col>
         <row>48</row>
         <sec>48</sec>
      </dimensions>
      <origin>
         <col>-24</col>
         <row>-24</row>
         <sec>-24</sec>
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      <spacing>
         <x>48</x>
         <y>48</y>
         <z>48</z>
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      <cell>
         <a units="&#8491;">168</a>
         <b units="&#8491;">168</b>
         <c units="&#8491;">168</c>
         <alpha units="deg">90</alpha>
         <beta units="deg">90</beta>
         <gamma units="deg">90</gamma>
      </cell>
      <axis_order>
         <fast>X</fast>
         <medium>Y</medium>
         <slow>Z</slow>
      </axis_order>
      <statistics>
         <minimum>-6.92291</minimum>
         <maximum>7.36805</maximum>
         <average>-0.00000000216671</average>
         <std>0.826326</std>
      </statistics>
      <pixel_spacing>
         <x units="&#8491;">3.5</x>
         <y units="&#8491;">3.5</y>
         <z units="&#8491;">3.5</z>
      </pixel_spacing>
      <contour_list>
         <contour primary="true">
            <level>2.0</level>
            <source>AUTHOR</source>
         </contour>
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      <annotation_details>Moloney mouse leukemia virus Env</annotation_details>
      <details>::::EMDATABANK.org::::EMD-2864::::</details>
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