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    <admin>
        <current_status>
            <date>2021-04-21</date>
            <code>REL</code>
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        </current_status>
        <sites>
            <deposition>RCSB</deposition>
            <last_processing>RCSB</last_processing>
        </sites>
        <key_dates>
            <deposition>2019-05-08</deposition>
            <header_release>2019-06-26</header_release>
            <map_release>2020-06-03</map_release>
            <update>2021-04-21</update>
        </key_dates>
        <grant_support>
            <grant_reference>
                <funding_body>National Science Foundation (United States)</funding_body>
                <code>DMR-1719875</code>
                <country>United States</country>
            </grant_reference>
        </grant_support>
        <title>The cryo-EM structure of Jack bean urease: further beyond the physical Nyquist limit using the K3 detector</title>
        <authors_list>
            <author>Feathers JR</author>
            <author>Spoth KA</author>
            <author>Fromme JC</author>
        </authors_list>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author order="1">Feathers JR</author>
                    <author order="2">Spoth KA</author>
                    <author order="3">Fromme JC</author>
                    <title>Experimental evaluation of super-resolution imaging and magnification choice in single-particle cryo-EM.</title>
                    <journal_abbreviation>J Struct Biol X</journal_abbreviation>
                    <country>NE</country>
                    <volume>5</volume>
                    <first_page>100047</first_page>
                    <last_page>100047</last_page>
                    <year>2021</year>
                    <external_references type="PUBMED">33817625</external_references>
                    <external_references type="DOI">doi:10.1016/j.yjsbx.2021.100047</external_references>
                    <external_references type="ISSN">2590-1524</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
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                <emdb_id>EMD-20016</emdb_id>
                <relationship>
                    <other>other EM volume</other>
                </relationship>
            </emdb_reference>
            <emdb_reference>
                <emdb_id>EMD-20213</emdb_id>
                <relationship>
                    <other>associated EM volume</other>
                </relationship>
            </emdb_reference>
        </emdb_list>
    </crossreferences>
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        <name>Jack bean urease</name>
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                <name>Jack bean urease</name>
                <parent>0</parent>
                <natural_source database="NCBI">
                    <organism ncbi="3823">Canavalia ensiformis</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.55</theoretical>
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            </complex_supramolecule>
        </supramolecule_list>
    </sample>
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            <method>singleParticle</method>
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                <single_particle_preparation preparation_id="1">
                    <concentration units="mg/mL">1</concentration>
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                        <ph>7.4</ph>
                    </buffer>
                    <grid>
                        <details>unspecified</details>
                    </grid>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                        <chamber_humidity units="percentage">100</chamber_humidity>
                        <chamber_temperature units="K">277</chamber_temperature>
                        <instrument>FEI VITROBOT MARK IV</instrument>
                    </vitrification>
                </single_particle_preparation>
            </specimen_preparation_list>
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                    <electron_source>FIELD EMISSION GUN</electron_source>
                    <acceleration_voltage units="kV">200</acceleration_voltage>
                    <c2_aperture_diameter units="µm">70.0</c2_aperture_diameter>
                    <nominal_cs units="mm">2.7</nominal_cs>
                    <nominal_defocus_min units="µm">0.8</nominal_defocus_min>
                    <nominal_defocus_max units="µm">1.5</nominal_defocus_max>
                    <nominal_magnification>39000.0</nominal_magnification>
                    <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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                            <slit_width units="eV">20</slit_width>
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                            <film_or_detector_model>GATAN K3 (6k x 4k)</film_or_detector_model>
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                        </image_recording>
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                </single_particle_microscopy>
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                        <pdb_id>3LA4</pdb_id>
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                    <applied_symmetry>
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                    <resolution_method>FSC 0.143 CUT-OFF</resolution_method>
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                        <software>
                            <name>RELION</name>
                            <version>3</version>
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                    <type>ANGULAR RECONSTITUTION</type>
                </initial_angle_assignment>
                <final_angle_assignment>
                    <type>ANGULAR RECONSTITUTION</type>
                </final_angle_assignment>
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        </structure_determination>
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        <label>::::EMDATABANK.org::::EMD-20213::::</label>
        <annotation_details>Jack bean urease</annotation_details>
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