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    <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>2009-01-27</deposition>
            <header_release>2009-02-03</header_release>
            <map_release>2009-04-01</map_release>
            <update>2012-10-10</update>
        </key_dates>
        <title>HIV-1 Env spike maps using various alignment and classfication combinations</title>
        <authors_list>
            <author>Zhu P</author>
            <author>Winkler H</author>
            <author>Chertova E</author>
            <author>Taylor KA</author>
            <author>Roux KH</author>
        </authors_list>
        <keywords>HIV-1, envelope spike</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author order="1">Zhu P</author>
                    <author order="2">Winkler H</author>
                    <author order="3">Chertova E</author>
                    <author order="4">Taylor KA</author>
                    <author order="5">Roux KH</author>
                    <title>Cryoelectron tomography of HIV-1 envelope spikes: further evidence for tripod-like legs.</title>
                    <journal>PLOS PATHOG.</journal>
                    <volume>4</volume>
                    <first_page>e1000203</first_page>
                    <last_page>e1000203</last_page>
                    <year>2008</year>
                    <external_references type="PUBMED">19008954</external_references>
                    <external_references type="DOI">doi:10.1371/journal.ppat.1000203</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
    </crossreferences>
    <sample>
        <name>HIV-1 BaL / SUPT1-CCR5 CL.30, provided by the AIDS Vaccine Program, SAIC Frederick, Inc., NCI, Frederick, MD. Lot p3955.</name>
        <supramolecule_list>
            <sample_supramolecule supramolecule_id="1000">
                <name>HIV-1 BaL / SUPT1-CCR5 CL.30, provided by the AIDS Vaccine Program, SAIC Frederick, Inc., NCI, Frederick, MD. Lot p3955.</name>
                <details>The envelope spikes are distributed on the surface of HIV-1 virions.</details>
                <oligomeric_state>Highly purified virus. The envelope spikes on the virion surface are trimer.</oligomeric_state>
                <number_unique_components>1</number_unique_components>
            </sample_supramolecule>
            <virus_supramolecule supramolecule_id="1">
                <name synonym="HIV-1 BaL SUPT1-CCR5 CL.30">Human immunodeficiency virus 1</name>
                <details>The envelope spikes are distributed on the surface of HIV-1 virions.</details>
                <sci_species_name ncbi="11676">Human immunodeficiency virus 1</sci_species_name>
                <natural_host database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                    <synonym_organism>VERTEBRATES</synonym_organism>
                </natural_host>
                <host_system database="NCBI" />
                <virus_type>VIRION</virus_type>
                <virus_isolate>STRAIN</virus_isolate>
                <virus_enveloped>true</virus_enveloped>
                <virus_empty>false</virus_empty>
                <syn_species_name>HIV-1 BaL SUPT1-CCR5 CL.30</syn_species_name>
            </virus_supramolecule>
        </supramolecule_list>
    </sample>
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        <structure_determination structure_determination_id="1">
            <method>subtomogramAveraging</method>
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                <subtomogram_averaging_preparation preparation_id="1">
                    <concentration units="mg/mL">2.8</concentration>
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                        <details>Originally in TNE, resuspend in PBS</details>
                    </buffer>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                        <instrument>HOMEMADE PLUNGER</instrument>
                        <details>Vitrification instrument: Home made. Vitrification carried out in cold room</details>
                        <method>Blot for 5-6 seconds before plunging</method>
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                </subtomogram_averaging_preparation>
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                    <illumination_mode>FLOOD BEAM</illumination_mode>
                    <imaging_mode>BRIGHT FIELD</imaging_mode>
                    <electron_source>FIELD EMISSION GUN</electron_source>
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        <annotation_details>Classified HIV-1 Env spikes using different alignment and classification strategies.</annotation_details>
        <details>::::EMDATABANK.org::::EMD-1596::::</details>
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