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            <date>2019-04-24</date>
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            <last_processing>PDBj</last_processing>
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        <key_dates>
            <deposition>2018-08-15</deposition>
            <header_release>2019-02-06</header_release>
            <map_release>2019-02-06</map_release>
            <update>2019-04-24</update>
        </key_dates>
        <title>Cryo-EM structure of Medusavirus empty particle</title>
        <authors_list>
            <author>Yoshikawa G</author>
            <author>Blanc-Mathieu R</author>
            <author>Song C</author>
            <author>Kayama Y</author>
            <author>Mochizuki T</author>
            <author>Murata K</author>
            <author>Ogata H</author>
            <author>Takemura M</author>
        </authors_list>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author order="1">Yoshikawa G</author>
                    <author order="2">Blanc-Mathieu R</author>
                    <author order="3">Song C</author>
                    <author order="4">Kayama Y</author>
                    <author order="5">Mochizuki T</author>
                    <author order="6">Murata K</author>
                    <author order="7">Ogata H</author>
                    <author order="8">Takemura M</author>
                    <title>Medusavirus, a Novel Large DNA Virus Discovered from Hot Spring Water.</title>
                    <journal_abbreviation>J. Virol.</journal_abbreviation>
                    <country>US</country>
                    <volume>93</volume>
                    <year>2019</year>
                    <external_references type="PUBMED">30728258</external_references>
                    <external_references type="DOI">doi:10.1128/JVI.02130-18</external_references>
                    <external_references type="ISSN">1098-5514</external_references>
                    <external_references type="CSD">0825</external_references>
                    <external_references type="ASTM">JOVIAM</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
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                <emdb_id>EMD-9620</emdb_id>
                <relationship>
                    <other>associated EM volume</other>
                </relationship>
            </emdb_reference>
            <emdb_reference>
                <emdb_id>EMD-9619</emdb_id>
                <relationship>
                    <other>other EM volume</other>
                </relationship>
                <details>DNA-full Medusavirus</details>
            </emdb_reference>
        </emdb_list>
    </crossreferences>
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        <name>Medusavirus</name>
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                <parent>0</parent>
                <sci_species_name ncbi="32644">Medusavirus</sci_species_name>
                <natural_host database="NCBI">
                    <organism ncbi="5755">Acanthamoeba castellanii</organism>
                </natural_host>
                <virus_shell shell_id="1">
                    <diameter units="Å">2600.0</diameter>
                    <triangulation>277</triangulation>
                </virus_shell>
                <virus_type>VIRION</virus_type>
                <virus_isolate>SPECIES</virus_isolate>
                <virus_enveloped>false</virus_enveloped>
                <virus_empty>true</virus_empty>
            </virus_supramolecule>
        </supramolecule_list>
    </sample>
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            <method>singleParticle</method>
            <aggregation_state>particle</aggregation_state>
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                    <buffer>
                        <ph>7.4</ph>
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                    <sugar_embedding>
                        <material>amorphous ice</material>
                    </sugar_embedding>
                    <grid>
                        <model>Quantifoil R1.2/1.3</model>
                        <material>MOLYBDENUM</material>
                        <mesh>400</mesh>
                        <pretreatment>
                            <type>GLOW DISCHARGE</type>
                        </pretreatment>
                    </grid>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                        <chamber_humidity units="percentage">95</chamber_humidity>
                        <chamber_temperature units="K">277</chamber_temperature>
                        <details />
                    </vitrification>
                </single_particle_preparation>
            </specimen_preparation_list>
            <microscopy_list>
                <single_particle_microscopy microscopy_id="1">
                    <microscope>JEOL 2200FS</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>
                    <c2_aperture_diameter units="µm">40.0</c2_aperture_diameter>
                    <nominal_cs units="mm">4.2</nominal_cs>
                    <nominal_defocus_min units="µm">2.0</nominal_defocus_min>
                    <calibrated_defocus_min units="µm">1.5783</calibrated_defocus_min>
                    <nominal_defocus_max units="µm">4.0</nominal_defocus_max>
                    <calibrated_defocus_max units="µm">4.9672</calibrated_defocus_max>
                    <nominal_magnification>25000.</nominal_magnification>
                    <calibrated_magnification>27862.</calibrated_magnification>
                    <specimen_holder_model>GATAN 626 SINGLE TILT LIQUID NITROGEN CRYO TRANSFER HOLDER</specimen_holder_model>
                    <cooling_holder_cryogen>NITROGEN</cooling_holder_cryogen>
                    <temperature>
                        <temperature_min units="K">76.0</temperature_min>
                        <temperature_max units="K">77.0</temperature_max>
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                        <basic />
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                        <energy_filter>
                            <name>In-column Omega Filter</name>
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                                    <width units="pixel">5120</width>
                                    <height units="pixel">3840</height>
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                                <sampling_interval units="µm">6.4</sampling_interval>
                                <frames_per_image>3-75</frames_per_image>
                            </digitization_details>
                            <number_real_images>1198</number_real_images>
                            <average_exposure_time units="s">3.0</average_exposure_time>
                            <average_electron_dose_per_image units="e/Å^2">20.0</average_electron_dose_per_image>
                        </image_recording>
                    </image_recording_list>
                </single_particle_microscopy>
            </microscopy_list>
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                            <name>CTFFIND</name>
                            <version>4</version>
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                    <algorithm>FOURIER SPACE</algorithm>
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