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    <admin>
        <current_status>
            <date>2025-12-24</date>
            <code>REL</code>
            <processing_site>RCSB</processing_site>
        </current_status>
        <revision_history>
            <revision version="1.0" date="2025-12-24">
                <change_list>
                    <metadata>
                        <revision_type>INITIAL_RELEASE</revision_type>
                        <provider>REPOSITORY</provider>
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                    <fsc>
                        <revision_type>INITIAL_RELEASE</revision_type>
                        <provider>REPOSITORY</provider>
                    </fsc>
                    <half_map part="1">
                        <revision_type>INITIAL_RELEASE</revision_type>
                        <provider>REPOSITORY</provider>
                    </half_map>
                    <half_map part="2">
                        <revision_type>INITIAL_RELEASE</revision_type>
                        <provider>REPOSITORY</provider>
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                    <image>
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                        <revision_type>INITIAL_RELEASE</revision_type>
                        <provider>REPOSITORY</provider>
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                </change_list>
            </revision>
        </revision_history>
        <sites>
            <deposition>RCSB</deposition>
            <last_processing>RCSB</last_processing>
        </sites>
        <key_dates>
            <deposition>2024-12-19</deposition>
            <header_release>2025-12-24</header_release>
            <map_release>2025-12-24</map_release>
            <update>2025-12-24</update>
        </key_dates>
        <grant_support>
            <grant_reference>
                <funding_body>Richard and Susan Smith Family Foundation</funding_body>
                <country>United States</country>
            </grant_reference>
            <grant_reference>
                <funding_body>Damon Runyon Cancer Research Foundation</funding_body>
                <country>United States</country>
            </grant_reference>
            <grant_reference>
                <funding_body>National Institutes of Health/National Institute of Environmental Health Sciences (NIH/NIEHS)</funding_body>
                <code>DP2-ES036404</code>
                <country>United States</country>
            </grant_reference>
        </grant_support>
        <title>Pol II-DSIF-SPT6-PAF1c-TFIIS-IWS1-ELOF1-LEDGF-nucleosome CTR9 TPR local map L</title>
        <authors_list>
            <author>Syau D</author>
            <author>Farnung L</author>
        </authors_list>
        <keywords>polymerase, elongation factor, nucleosome, TRANSCRIPTION</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="false">
                    <author order="1">Syau D</author>
                    <author order="2">Farnung L</author>
                    <title>Structure and function of IWS1 in transcription elongation</title>
                    <journal_abbreviation>To Be Published</journal_abbreviation>
                    <external_references type="CSD">0353</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
        <other_db_list>
            <db_reference>
                <db_name>PDB</db_name>
                <accession_id>9MLC</accession_id>
                <content_type>unspecified</content_type>
                <details>9MLC contains the model for the composite map associated with this entry</details>
            </db_reference>
            <db_reference>
                <db_name>EMDB</db_name>
                <accession_id>EMD-48366</accession_id>
                <content_type>associated EM volume</content_type>
            </db_reference>
        </other_db_list>
    </crossreferences>
    <sample>
        <name>RNA polymerase II-DSIF-SPT6-PAF1c-TFIIS-IWS1-ELOF1-LEDGF-nucleosome complex</name>
        <supramolecule_list>
            <complex_supramolecule supramolecule_id="1">
                <name>RNA polymerase II-DSIF-SPT6-PAF1c-TFIIS-IWS1-ELOF1-LEDGF-nucleosome complex</name>
                <parent>0</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>1</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>2</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>3</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>4</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>5</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>6</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>7</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>8</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>9</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>10</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>11</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>12</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>13</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>14</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>15</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>16</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>17</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>18</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>19</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>20</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>21</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>22</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>23</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>24</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>25</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>26</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>27</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>28</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>29</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>30</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>31</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>32</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">1.7</theoretical>
                </molecular_weight>
            </complex_supramolecule>
            <complex_supramolecule supramolecule_id="2">
                <name>RNA polymerase II</name>
                <parent>1</parent>
                <natural_source database="NCBI">
                    <organism ncbi="9823">Sus scrofa</organism>
                </natural_source>
            </complex_supramolecule>
            <organelle_or_cellular_component_supramolecule supramolecule_id="3">
                <name>SPT6</name>
                <parent>1</parent>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
            </organelle_or_cellular_component_supramolecule>
            <complex_supramolecule supramolecule_id="4">
                <name>DSIF (SPT4 and SPT5)</name>
                <parent>1</parent>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
            </complex_supramolecule>
            <complex_supramolecule supramolecule_id="5">
                <name>PAF1 complex (CTR9, CDC73, PAF1, LEO1, WDR61, RTF1)</name>
                <parent>1</parent>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
            </complex_supramolecule>
            <complex_supramolecule supramolecule_id="6">
                <name>PAF1 complex (CTR9, CDC73, PAF1, LEO1, WDR61)</name>
                <parent>5</parent>
                <details>CTR9, CDC73, PAF1, LEO1, WDR61 expressed and purified together</details>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
            </complex_supramolecule>
            <organelle_or_cellular_component_supramolecule supramolecule_id="7">
                <name>RTF1</name>
                <parent>5</parent>
                <details>RTF1 expressed and purified separately</details>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
            </organelle_or_cellular_component_supramolecule>
            <organelle_or_cellular_component_supramolecule supramolecule_id="8">
                <name>TFIIS</name>
                <parent>1</parent>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
            </organelle_or_cellular_component_supramolecule>
            <organelle_or_cellular_component_supramolecule supramolecule_id="9">
                <name>IWS1</name>
                <parent>1</parent>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
            </organelle_or_cellular_component_supramolecule>
            <organelle_or_cellular_component_supramolecule supramolecule_id="10">
                <name>ELOF1</name>
                <parent>1</parent>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
            </organelle_or_cellular_component_supramolecule>
            <organelle_or_cellular_component_supramolecule supramolecule_id="11">
                <name>LEDGF</name>
                <parent>1</parent>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
            </organelle_or_cellular_component_supramolecule>
            <complex_supramolecule supramolecule_id="12">
                <name>Nucleosome</name>
                <parent>1</parent>
                <details>Nucleosome containing H3K36cme3-modified histone octamer and synthetic DNA</details>
                <natural_source database="NCBI">
                    <organism ncbi="8355">Xenopus laevis</organism>
                </natural_source>
            </complex_supramolecule>
        </supramolecule_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>
                        <component>
                            <concentration units="mM">20.0</concentration>
                            <formula>HEPES</formula>
                            <name>4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid</name>
                        </component>
                        <component>
                            <concentration units="mM">50.0</concentration>
                            <formula>NaCl</formula>
                            <name>sodium chloride</name>
                        </component>
                        <component>
                            <concentration units="mM">3.0</concentration>
                            <formula>MgCl2</formula>
                            <name>magnesium chloride</name>
                        </component>
                        <component>
                            <concentration units="mM">1.0</concentration>
                            <formula>TCEP</formula>
                            <name>(tris(2-carboxyethyl)phosphine)</name>
                        </component>
                    </buffer>
                    <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>
            <microscopy_list>
                <single_particle_microscopy microscopy_id="1">
                    <microscope>TFS KRIOS</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_defocus_min units="µm">0.6</nominal_defocus_min>
                    <nominal_defocus_max units="µm">1.8</nominal_defocus_max>
                    <nominal_magnification>105000.0</nominal_magnification>
                    <specialist_optics>
                        <phase_plate>VOLTA PHASE PLATE</phase_plate>
                        <energy_filter>
                            <name>TFS Selectris</name>
                        </energy_filter>
                    </specialist_optics>
                    <image_recording_list>
                        <image_recording image_recording_id="1">
                            <film_or_detector_model>TFS FALCON 4i (4k x 4k)</film_or_detector_model>
                            <number_grids_imaged>2</number_grids_imaged>
                            <number_real_images>30316</number_real_images>
                            <average_exposure_time units="s">4.21</average_exposure_time>
                            <average_electron_dose_per_image units="e/Å^2">37.0</average_electron_dose_per_image>
                        </image_recording>
                    </image_recording_list>
                </single_particle_microscopy>
            </microscopy_list>
            <singleparticle_processing image_processing_id="1">
                <image_recording_id>1</image_recording_id>
                <particle_selection>
                    <number_selected>4597368</number_selected>
                </particle_selection>
                <ctf_correction>
                    <software_list>
                        <software>
                            <name>cryoSPARC</name>
                            <version>3.2.0</version>
                        </software>
                    </software_list>
                    <type>PHASE FLIPPING AND AMPLITUDE CORRECTION</type>
                </ctf_correction>
                <startup_model type_of_model="NONE"/>
                <final_reconstruction>
                    <resolution units="Å" res_type="BY AUTHOR">2.6</resolution>
                    <resolution_method>FSC 0.143 CUT-OFF</resolution_method>
                    <software_list>
                        <software>
                            <name>cryoSPARC</name>
                            <version>4.7.0</version>
                        </software>
                    </software_list>
                    <number_images_used>63837</number_images_used>
                </final_reconstruction>
                <initial_angle_assignment>
                    <type>MAXIMUM LIKELIHOOD</type>
                    <software_list>
                        <software>
                            <name>cryoSPARC</name>
                            <version>3.2.0</version>
                        </software>
                    </software_list>
                </initial_angle_assignment>
                <final_angle_assignment>
                    <type>MAXIMUM LIKELIHOOD</type>
                    <software_list>
                        <software>
                            <name>cryoSPARC</name>
                            <version>3.2.0</version>
                        </software>
                    </software_list>
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            <b units="Å">547.4</b>
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        <annotation_details>Pol II-DSIF-SPT6-PAF1c-TFIIS-IWS1-ELOF1-LEDGF-nucleosome CTR9 TPR local map L</annotation_details>
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                    <beta units="deg">90.0</beta>
                    <gamma units="deg">90.0</gamma>
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                    <medium>Y</medium>
                    <slow>Z</slow>
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                <annotation_details>Pol II-DSIF-SPT6-PAF1c-TFIIS-IWS1-ELOF1-LEDGF-nucleosome CTR9 TPR local map L half B</annotation_details>
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