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    <admin>
        <current_status>
            <date>2025-03-05</date>
            <code>REL</code>
            <processing_site>RCSB</processing_site>
        </current_status>
        <revision_history>
            <revision version="1.0" date="2025-03-05">
                <change_list>
                    <metadata>
                        <revision_type>INITIAL_RELEASE</revision_type>
                        <provider>REPOSITORY</provider>
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                        <revision_type>INITIAL_RELEASE</revision_type>
                        <provider>REPOSITORY</provider>
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                        <revision_type>INITIAL_RELEASE</revision_type>
                        <provider>REPOSITORY</provider>
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                        <revision_type>INITIAL_RELEASE</revision_type>
                        <provider>REPOSITORY</provider>
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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>2024-07-22</deposition>
            <header_release>2025-03-05</header_release>
            <map_release>2025-03-05</map_release>
            <update>2025-03-05</update>
        </key_dates>
        <grant_support>
            <grant_reference>
                <funding_body>National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)</funding_body>
                <code>R01GM083122</code>
                <country>United States</country>
            </grant_reference>
            <grant_reference>
                <funding_body>Life Sciences Research Foundation</funding_body>
                <country>United States</country>
            </grant_reference>
        </grant_support>
        <title>Ciliary 96-nm repeat unit from active sperm cells of the American eel (Anguilla rostrata)</title>
        <authors_list>
            <author ORCID="0000-0002-6695-7070">Schrad JR</author>
            <author ORCID="0000-0002-5174-7011">Fu G</author>
            <author>Hable WE</author>
            <author ORCID="0000-0002-1418-2058">Tayar AM</author>
            <author>Oliveira K</author>
            <author ORCID="0000-0002-0122-7173">Nicastro D</author>
        </authors_list>
        <keywords>cilia, flagella, axoneme, MOTOR PROTEIN</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author order="1">Schrad JR</author>
                    <author order="2">Fu G</author>
                    <author order="3">Hable WE</author>
                    <author order="4">Tayar AM</author>
                    <author order="5">Oliveira K</author>
                    <author ORCID="0000-0002-0122-7173" order="6">Nicastro D</author>
                    <title>Cryo-electron tomography of eel sperm flagella reveals a molecular "minimum system" for motile cilia.</title>
                    <journal_abbreviation>Mol.Biol.Cell</journal_abbreviation>
                    <country>US</country>
                    <volume>36</volume>
                    <first_page>ar15</first_page>
                    <last_page>ar15</last_page>
                    <year>2025</year>
                    <external_references type="PUBMED">39661459</external_references>
                    <external_references type="DOI">doi:10.1091/mbc.E24-08-0351</external_references>
                    <external_references type="ISSN">1939-4586</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
        <emdb_list>
            <emdb_reference>
                <emdb_id>EMD-45870</emdb_id>
                <relationship>
                    <other>other EM volume</other>
                </relationship>
                <details>Eel sperm axoneme subunit from active and inhibited cells.</details>
            </emdb_reference>
            <emdb_reference>
                <emdb_id>EMD-45872</emdb_id>
                <relationship>
                    <other>other EM volume</other>
                </relationship>
                <details>EHNA-inhibited eel sperm axoneme repeat unit</details>
            </emdb_reference>
        </emdb_list>
    </crossreferences>
    <sample>
        <name>96-nm axoneme repeat unit from active American eel sperm flagella</name>
        <supramolecule_list>
            <organelle_or_cellular_component_supramolecule supramolecule_id="1">
                <name>96-nm axoneme repeat unit from active American eel sperm flagella</name>
                <parent>0</parent>
                <natural_source database="NCBI">
                    <organism ncbi="7938">Anguilla rostrata</organism>
                    <tissue>Sperm cells</tissue>
                    <organelle>Flagella</organelle>
                </natural_source>
            </organelle_or_cellular_component_supramolecule>
        </supramolecule_list>
    </sample>
    <structure_determination_list>
        <structure_determination structure_determination_id="1">
            <method>subtomogramAveraging</method>
            <aggregation_state>cell</aggregation_state>
            <specimen_preparation_list>
                <subtomogram_averaging_preparation preparation_id="1">
                    <buffer>
                        <ph>8.0</ph>
                        <component>
                            <concentration units="mM">360.0</concentration>
                            <formula>NaCl</formula>
                            <name>sodium chloride</name>
                        </component>
                        <component>
                            <concentration units="mM">50.0</concentration>
                            <formula>MgCl2</formula>
                            <name>magnesium chloride</name>
                        </component>
                        <component>
                            <concentration units="mM">10.0</concentration>
                            <formula>CaCl2</formula>
                            <name>calcium chloride</name>
                        </component>
                        <component>
                            <concentration units="mM">10.0</concentration>
                            <formula>KCl</formula>
                            <name>potassium chloride</name>
                        </component>
                        <component>
                            <concentration units="mM">30.0</concentration>
                            <name>HEPES</name>
                        </component>
                        <details>Artificial sea water, used for sperm cell activation</details>
                    </buffer>
                    <grid>
                        <model>Quantifoil R2/2</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>
                            <time units="s">30</time>
                            <atmosphere>AIR</atmosphere>
                        </pretreatment>
                    </grid>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                        <instrument>HOMEMADE PLUNGER</instrument>
                        <details>Back-side blotting for 3-5 seconds before plunging.. </details>
                    </vitrification>
                </subtomogram_averaging_preparation>
            </specimen_preparation_list>
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                <subtomogram_averaging_microscopy microscopy_id="1">
                    <microscope>FEI TITAN KRIOS</microscope>
                    <illumination_mode>FLOOD BEAM</illumination_mode>
                    <imaging_mode>BRIGHT FIELD</imaging_mode>
                    <electron_source>FIELD EMISSION GUN</electron_source>
                    <acceleration_voltage units="kV">300</acceleration_voltage>
                    <c2_aperture_diameter units="µm">100.0</c2_aperture_diameter>
                    <nominal_defocus_min units="µm">0.5</nominal_defocus_min>
                    <nominal_defocus_max units="µm">0.5</nominal_defocus_max>
                    <nominal_magnification>26000.0</nominal_magnification>
                    <specimen_holder_model>FEI TITAN KRIOS AUTOGRID HOLDER</specimen_holder_model>
                    <cooling_holder_cryogen>NITROGEN</cooling_holder_cryogen>
                    <specialist_optics>
                        <phase_plate>VOLTA PHASE PLATE</phase_plate>
                        <energy_filter>
                            <name>GIF Bioquantum</name>
                            <slit_width units="eV">20</slit_width>
                        </energy_filter>
                    </specialist_optics>
                    <image_recording_list>
                        <image_recording image_recording_id="1">
                            <film_or_detector_model>GATAN K3 (6k x 4k)</film_or_detector_model>
                            <average_electron_dose_per_image units="e/Å^2">1.6</average_electron_dose_per_image>
                        </image_recording>
                    </image_recording_list>
                </subtomogram_averaging_microscopy>
            </microscopy_list>
            <subtomogram_averaging_processing image_processing_id="1">
                <image_recording_id>1</image_recording_id>
                <final_reconstruction>
                    <resolution units="Å" res_type="BY AUTHOR">23.0</resolution>
                    <resolution_method>FSC 0.5 CUT-OFF</resolution_method>
                    <software_list>
                        <software>
                            <name>IMOD</name>
                        </software>
                        <software>
                            <name>PEET</name>
                        </software>
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                    <number_subtomograms_used>1380</number_subtomograms_used>
                </final_reconstruction>
                <extraction>
                    <number_tomograms>12</number_tomograms>
                    <number_images_used>1380</number_images_used>
                    <software_list>
                        <software>
                            <name>IMOD</name>
                        </software>
                        <software>
                            <name>PEET</name>
                        </software>
                    </software_list>
                </extraction>
                <final_angle_assignment>
                    <type>NOT APPLICABLE</type>
                </final_angle_assignment>
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        </structure_determination>
    </structure_determination_list>
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        <file>emd_45871.map.gz</file>
        <symmetry>
            <space_group>1</space_group>
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            <row>196</row>
            <sec>232</sec>
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            <sec>-19</sec>
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            <y>196</y>
            <z>232</z>
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            <a units="Å">992.565</a>
            <b units="Å">617.596</b>
            <c units="Å">731.032</c>
            <alpha units="deg">90.0</alpha>
            <beta units="deg">90.0</beta>
            <gamma units="deg">90.0</gamma>
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        <axis_order>
            <fast>X</fast>
            <medium>Y</medium>
            <slow>Z</slow>
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        <statistics>
            <minimum>112.823089999999993</minimum>
            <maximum>143.181489999999997</maximum>
            <average>127.567779999999999</average>
            <std>3.3000014</std>
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        <pixel_spacing>
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            <y units="Å">3.151</y>
            <z units="Å">3.151</z>
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        <contour_list>
            <contour primary="true">
                <level>129.0</level>
                <source>AUTHOR</source>
            </contour>
        </contour_list>
        <label>::::EMDATABANK.org::::EMD-45871::::</label>
        <annotation_details>Subtomogram average of the 96-nm axonemal repeat unit of active eel sperm flagella.</annotation_details>
    </map>
    <interpretation>
        <half_map_list>
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                    <row>196</row>
                    <sec>232</sec>
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                    <y>196</y>
                    <z>232</z>
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                    <b units="Å">617.596</b>
                    <c units="Å">731.032</c>
                    <alpha units="deg">90.0</alpha>
                    <beta units="deg">90.0</beta>
                    <gamma units="deg">90.0</gamma>
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                <axis_order>
                    <fast>X</fast>
                    <medium>Y</medium>
                    <slow>Z</slow>
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                    <minimum>-15.464877</minimum>
                    <maximum>17.282938000000001</maximum>
                    <average>0.07711873</average>
                    <std>3.4889672</std>
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                <pixel_spacing>
                    <x units="Å">3.151</x>
                    <y units="Å">3.151</y>
                    <z units="Å">3.151</z>
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                <contour_list>
                    <contour primary="true">
                        <source>AUTHOR</source>
                    </contour>
                </contour_list>
                <label>::::EMDATABANK.org::::EMD-45871::::</label>
                <annotation_details>Half maps are unwindowed, they need to be windowed, tapered, masked or etc. before FSC calculation.</annotation_details>
            </half_map>
            <half_map format="CCP4" size_kbytes="57295">
                <file>emd_45871_half_map_2.map.gz</file>
                <symmetry>
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                </symmetry>
                <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
                <dimensions>
                    <col>315</col>
                    <row>196</row>
                    <sec>232</sec>
                </dimensions>
                <origin>
                    <col>-135</col>
                    <row>-69</row>
                    <sec>-19</sec>
                </origin>
                <spacing>
                    <x>315</x>
                    <y>196</y>
                    <z>232</z>
                </spacing>
                <cell>
                    <a units="Å">992.565</a>
                    <b units="Å">617.596</b>
                    <c units="Å">731.032</c>
                    <alpha units="deg">90.0</alpha>
                    <beta units="deg">90.0</beta>
                    <gamma units="deg">90.0</gamma>
                </cell>
                <axis_order>
                    <fast>X</fast>
                    <medium>Y</medium>
                    <slow>Z</slow>
                </axis_order>
                <statistics>
                    <minimum>-16.507266999999999</minimum>
                    <maximum>17.476521999999999</maximum>
                    <average>0.08514171</average>
                    <std>3.5472353</std>
                </statistics>
                <pixel_spacing>
                    <x units="Å">3.151</x>
                    <y units="Å">3.151</y>
                    <z units="Å">3.151</z>
                </pixel_spacing>
                <contour_list>
                    <contour primary="true">
                        <source>AUTHOR</source>
                    </contour>
                </contour_list>
                <label>::::EMDATABANK.org::::EMD-45871::::</label>
                <annotation_details>Half maps are unwindowed, they need to be windowed, tapered, masked or etc. before FSC calculation.</annotation_details>
            </half_map>
        </half_map_list>
    </interpretation>
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