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            <date>2018-11-28</date>
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            <deposition>RCSB</deposition>
            <last_processing>RCSB</last_processing>
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        <key_dates>
            <deposition>2018-10-27</deposition>
            <header_release>2018-11-28</header_release>
            <map_release>2018-11-28</map_release>
            <update>2018-11-28</update>
        </key_dates>
        <title>Single-Molecule 3D Image of Low-Density Lipoprotein in Complex with Cholesteryl Ester Transfer Protein (No. 01)</title>
        <authors_list>
            <author>Wu H</author>
            <author>Zhai X</author>
            <author>Lei D</author>
            <author>Liu J</author>
            <author>Yu Y</author>
            <author>Bie R</author>
            <author>Ren G</author>
        </authors_list>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author order="1">Wu H</author>
                    <author order="2">Zhai X</author>
                    <author order="3">Lei D</author>
                    <author order="4">Liu J</author>
                    <author order="5">Yu Y</author>
                    <author order="6">Bie R</author>
                    <author order="7">Ren G</author>
                    <title>An Algorithm for Enhancing the Image Contrast of Electron Tomography.</title>
                    <journal_abbreviation>Sci Rep</journal_abbreviation>
                    <country>UK</country>
                    <volume>8</volume>
                    <first_page>16711</first_page>
                    <last_page>16711</last_page>
                    <year>2018</year>
                    <external_references type="PUBMED">30420636</external_references>
                    <external_references type="DOI">doi:10.1038/s41598-018-34652-9</external_references>
                    <external_references type="ISSN">2045-2322</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
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            <emdb_reference>
                <emdb_id>EMD-9268</emdb_id>
                <relationship>
                    <other>associated EM volume</other>
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    <sample>
        <name>Human plasma low-density lipoprotein in complex with cholesteryl ester transfer protein</name>
        <supramolecule_list>
            <complex_supramolecule supramolecule_id="1">
                <name>Human plasma low-density lipoprotein in complex with cholesteryl ester transfer protein</name>
                <parent>0</parent>
                <details>Low-density lipoproteins (LDLs) were isolated from human plasma by density gradient ultracentrifugation (Children's Hospital Oakland Research Institute). Cholesteryl ester transfer protein (CETP) was produced by MERCK. LDL and CETP were incubated at 37 degC for 15 minutes at a molar ratio of ~4:1.</details>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">2.5</theoretical>
                </molecular_weight>
            </complex_supramolecule>
            <complex_supramolecule supramolecule_id="2">
                <name>Human plasma low-density lipoprotein</name>
                <parent>1</parent>
                <details>Low-density lipoproteins (LDLs) were isolated from human plasma by density gradient ultracentrifugation (Children's Hospital Oakland Research Institute).</details>
            </complex_supramolecule>
            <organelle_or_cellular_component_supramolecule supramolecule_id="3">
                <name>Cholesteryl ester transfer protein</name>
                <parent>1</parent>
                <details>Cholesteryl ester transfer protein (CETP) was produced by MERCK.</details>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
            </organelle_or_cellular_component_supramolecule>
        </supramolecule_list>
    </sample>
    <structure_determination_list>
        <structure_determination structure_determination_id="1">
            <method>tomography</method>
            <aggregation_state>particle</aggregation_state>
            <specimen_preparation_list>
                <tomography_preparation preparation_id="1">
                    <buffer>
                        <ph>7.</ph>
                        <details>1X Dulbeccos phosphate-buffered saline</details>
                    </buffer>
                    <grid>
                        <model>Homemade</model>
                        <material>COPPER</material>
                        <mesh>200</mesh>
                        <support_film film_type_id="1">
                            <film_material>CARBON</film_material>
                            <film_topology>HOLEY</film_topology>
                        </support_film>
                        <pretreatment>
                            <type>GLOW DISCHARGE</type>
                            <atmosphere>AIR</atmosphere>
                        </pretreatment>
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                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                        <chamber_humidity units="percentage">90</chamber_humidity>
                        <instrument>LEICA EM GP</instrument>
                        <details />
                    </vitrification>
                    <details>Low-density lipoproteins (LDLs) were isolated from human plasma by density gradient ultracentrifugation (Children's Hospital Oakland Research Institute). Cholesteryl ester transfer protein (CETP) was produced by MERCK. LDL and CETP were incubated at 37 degC for 15 minutes at a molar ratio of ~4:1.</details>
                    <sectioning>
                        <other_sectioning>NO SECTIONING</other_sectioning>
                    </sectioning>
                </tomography_preparation>
            </specimen_preparation_list>
            <microscopy_list>
                <tomography_microscopy microscopy_id="1">
                    <microscope>ZEISS LIBRA120PLUS</microscope>
                    <illumination_mode>FLOOD BEAM</illumination_mode>
                    <imaging_mode>BRIGHT FIELD</imaging_mode>
                    <electron_source>LAB6</electron_source>
                    <acceleration_voltage units="kV">120</acceleration_voltage>
                    <nominal_cs units="mm">2.2</nominal_cs>
                    <nominal_magnification>50000.</nominal_magnification>
                    <alignment_procedure>
                        <basic />
                    </alignment_procedure>
                    <specialist_optics>
                        <energy_filter>
                            <name>In-column Omega Filter</name>
                            <slit_width units="eV">20</slit_width>
                        </energy_filter>
                    </specialist_optics>
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                        <image_recording image_recording_id="1">
                            <film_or_detector_model>GATAN ULTRASCAN 4000 (4k x 4k)</film_or_detector_model>
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                                <dimensions>
                                    <width units="pixel">4096</width>
                                    <height units="pixel">4096</height>
                                </dimensions>
                            </digitization_details>
                            <average_electron_dose_per_image units="e/&#8491;^2">0.26</average_electron_dose_per_image>
                        </image_recording>
                    </image_recording_list>
                </tomography_microscopy>
            </microscopy_list>
            <tomography_processing image_processing_id="1">
                <image_recording_id>1</image_recording_id>
                <details>X-ray speckles in images were removed before CTF correction.</details>
                <final_reconstruction>
                    <algorithm>FOURIER SPACE</algorithm>
                    <resolution res_type="BY AUTHOR" units="&#8491;">71.0</resolution>
                    <resolution_method>FSC 0.5 CUT-OFF</resolution_method>
                    <details>The 3D reconstruction was performed by using individual-particle electron tomography (IPET). The obtained 3D map was low-pass filtered to 7 nm.</details>
                    <number_images_used>77</number_images_used>
                </final_reconstruction>
                <ctf_correction>
                    <software_list>
                        <software>
                            <name>TOMOCTF</name>
                        </software>
                    </software_list>
                </ctf_correction>
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