<?xml version="1.0" encoding="UTF-8"?>
<emd xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="https://ftp.ebi.ac.uk/pub/databases/em_ebi/emdb_related/emdb-schemas/emdb_schemas/v3/v3_0_11_4/emdb.xsd" version="3.0.11.4" emdb_id="EMD-71864">
    <admin>
        <current_status>
            <date>2026-07-22</date>
            <code>REL</code>
            <processing_site>RCSB</processing_site>
        </current_status>
        <revision_history>
            <revision version="1.0" date="2026-07-22">
                <change_list>
                    <metadata>
                        <revision_type>INITIAL_RELEASE</revision_type>
                        <provider>REPOSITORY</provider>
                    </metadata>
                    <image>
                        <revision_type>INITIAL_RELEASE</revision_type>
                        <provider>REPOSITORY</provider>
                    </image>
                    <primary_map>
                        <revision_type>INITIAL_RELEASE</revision_type>
                        <provider>REPOSITORY</provider>
                    </primary_map>
                </change_list>
            </revision>
        </revision_history>
        <sites>
            <deposition>RCSB</deposition>
            <last_processing>RCSB</last_processing>
        </sites>
        <key_dates>
            <deposition>2025-07-30</deposition>
            <header_release>2026-07-22</header_release>
            <map_release>2026-07-22</map_release>
            <update>2026-07-22</update>
        </key_dates>
        <grant_support>
            <grant_reference>
                <funding_body>Beckman Foundation</funding_body>
                <code>2021FIB-41</code>
                <country>United States</country>
            </grant_reference>
            <grant_reference>
                <funding_body>National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)</funding_body>
                <code>F31NS132517</code>
                <country>United States</country>
            </grant_reference>
            <grant_reference>
                <funding_body>National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)</funding_body>
                <code>R35GM151999</code>
                <country>United States</country>
            </grant_reference>
            <grant_reference>
                <funding_body>National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)</funding_body>
                <code>NS062829</code>
                <country>United States</country>
            </grant_reference>
            <grant_reference>
                <funding_body>National Institutes of Health/National Institute of Mental Health (NIH/NIMH)</funding_body>
                <code>MH137505</code>
                <country>United States</country>
            </grant_reference>
            <grant_reference>
                <funding_body>National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)</funding_body>
                <code>R01NS101686</code>
                <country>United States</country>
            </grant_reference>
        </grant_support>
        <title>Sheet-like aggregate from 20 DIV embryonic rat cortical neurons</title>
        <authors_list>
            <author ORCID="0000-0001-5329-4629">Anderson EA</author>
            <author ORCID="0000-0002-1903-1574">Ludtke SJ</author>
        </authors_list>
        <keywords>Calcium-phosphate, sheet, UNKNOWN FUNCTION</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author order="1">Anderson ED</author>
                    <author order="2">Cronkite CA</author>
                    <author order="3">Baldwin PR</author>
                    <author order="4">Abella CP</author>
                    <author order="5">Duman JG</author>
                    <author order="6">Simmonds AN</author>
                    <author order="7">Waxham MN</author>
                    <author order="8">Tolias KF</author>
                    <author order="9">Ludtke SJ</author>
                    <title>Primary cortical neurons precipitate and extrude large mitochondria-associated calcium-phosphate sheets with a bone-precursor-like ultrastructure.</title>
                    <journal_abbreviation>Mol Brain</journal_abbreviation>
                    <volume>19</volume>
                    <first_page>11</first_page>
                    <last_page>11</last_page>
                    <year>2026</year>
                    <external_references type="PUBMED">41508094</external_references>
                    <external_references type="DOI">doi:10.1186/s13041-025-01272-0</external_references>
                    <external_references type="ISSN">1756-6606</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
        <emdb_list>
            <emdb_reference>
                <emdb_id>EMD-71850</emdb_id>
                <relationship>
                    <other>other EM volume</other>
                </relationship>
            </emdb_reference>
            <emdb_reference>
                <emdb_id>EMD-71851</emdb_id>
                <relationship>
                    <other>other EM volume</other>
                </relationship>
            </emdb_reference>
            <emdb_reference>
                <emdb_id>EMD-71853</emdb_id>
                <relationship>
                    <other>other EM volume</other>
                </relationship>
            </emdb_reference>
            <emdb_reference>
                <emdb_id>EMD-71852</emdb_id>
                <relationship>
                    <other>other EM volume</other>
                </relationship>
            </emdb_reference>
            <emdb_reference>
                <emdb_id>EMD-71862</emdb_id>
                <relationship>
                    <other>other EM volume</other>
                </relationship>
            </emdb_reference>
            <emdb_reference>
                <emdb_id>EMD-71863</emdb_id>
                <relationship>
                    <other>other EM volume</other>
                </relationship>
            </emdb_reference>
            <emdb_reference>
                <emdb_id>EMD-71859</emdb_id>
                <relationship>
                    <other>other EM volume</other>
                </relationship>
            </emdb_reference>
            <emdb_reference>
                <emdb_id>EMD-71860</emdb_id>
                <relationship>
                    <other>other EM volume</other>
                </relationship>
            </emdb_reference>
            <emdb_reference>
                <emdb_id>EMD-71861</emdb_id>
                <relationship>
                    <other>other EM volume</other>
                </relationship>
            </emdb_reference>
        </emdb_list>
        <other_db_list>
            <db_reference>
                <db_name>EMDB</db_name>
                <accession_id>EMD-71850</accession_id>
                <content_type>other EM volume</content_type>
            </db_reference>
            <db_reference>
                <db_name>EMDB</db_name>
                <accession_id>EMD-71851</accession_id>
                <content_type>other EM volume</content_type>
            </db_reference>
            <db_reference>
                <db_name>EMDB</db_name>
                <accession_id>EMD-71853</accession_id>
                <content_type>other EM volume</content_type>
            </db_reference>
            <db_reference>
                <db_name>EMDB</db_name>
                <accession_id>EMD-71852</accession_id>
                <content_type>other EM volume</content_type>
            </db_reference>
            <db_reference>
                <db_name>EMDB</db_name>
                <accession_id>EMD-71862</accession_id>
                <content_type>other EM volume</content_type>
            </db_reference>
            <db_reference>
                <db_name>EMDB</db_name>
                <accession_id>EMD-71863</accession_id>
                <content_type>other EM volume</content_type>
            </db_reference>
            <db_reference>
                <db_name>EMDB</db_name>
                <accession_id>EMD-71859</accession_id>
                <content_type>other EM volume</content_type>
            </db_reference>
            <db_reference>
                <db_name>EMDB</db_name>
                <accession_id>EMD-71860</accession_id>
                <content_type>other EM volume</content_type>
            </db_reference>
            <db_reference>
                <db_name>EMDB</db_name>
                <accession_id>EMD-71861</accession_id>
                <content_type>other EM volume</content_type>
            </db_reference>
            <db_reference>
                <db_name>EMDB</db_name>
                <accession_id>EMD-71864</accession_id>
                <content_type>associated EM volume</content_type>
            </db_reference>
        </other_db_list>
    </crossreferences>
    <sample>
        <name>20 DIV E18 rat cortical neuron sheet-like aggregate</name>
        <supramolecule_list>
            <cell_supramolecule supramolecule_id="1">
                <name>20 DIV E18 rat cortical neuron sheet-like aggregate</name>
                <parent>0</parent>
                <natural_source database="NCBI">
                    <organism ncbi="10116">Rattus norvegicus</organism>
                </natural_source>
            </cell_supramolecule>
        </supramolecule_list>
    </sample>
    <structure_determination_list>
        <structure_determination structure_determination_id="1">
            <method>tomography</method>
            <aggregation_state>cell</aggregation_state>
            <specimen_preparation_list>
                <tomography_preparation preparation_id="1">
                    <buffer>
                        <ph>7.4</ph>
                    </buffer>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                        <chamber_humidity units="percentage">60</chamber_humidity>
                        <instrument>LEICA EM GP</instrument>
                    </vitrification>
                    <details>E18 rat cortical neurons grown on holey-carbon grids for 20 days in neurobasal media with glutamine and B27</details>
                    <sectioning>
                        <other_sectioning>NO SECTIONING</other_sectioning>
                    </sectioning>
                </tomography_preparation>
            </specimen_preparation_list>
            <microscopy_list>
                <tomography_microscopy microscopy_id="1">
                    <microscope>TFS GLACIOS</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>
                    <nominal_defocus_min units="µm">6.5</nominal_defocus_min>
                    <nominal_defocus_max units="µm">9.200000000000001</nominal_defocus_max>
                    <image_recording_list>
                        <image_recording image_recording_id="1">
                            <film_or_detector_model>FEI FALCON IV (4k x 4k)</film_or_detector_model>
                            <average_electron_dose_per_image units="e/Å^2">1.54</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>Tomogram was reconstructed with EMAN2 as described previously: Chen, M., J.M. Bell, X. Shi, S.Y. Sun, Z. Wang, and S.J. Ludtke. 2019. A complete data processing workflow for cryo-ET and subtomogram averaging. Nat Methods. 16:1161?1168. doi:10.1038/s41592-019-0591-8.</details>
                <final_reconstruction>
                    <software_list>
                        <software>
                            <name>EMAN2</name>
                        </software>
                    </software_list>
                    <number_images_used>45</number_images_used>
                </final_reconstruction>
                <ctf_correction>
                    <software_list>
                        <software>
                            <name>EMAN2</name>
                        </software>
                    </software_list>
                    <details>Tomogram was CTF corrected with EMAN2</details>
                    <type>PHASE FLIPPING ONLY</type>
                </ctf_correction>
            </tomography_processing>
        </structure_determination>
    </structure_determination_list>
    <map format="CCP4" size_kbytes="3221226">
        <file>emd_71864.map.gz</file>
        <symmetry>
            <space_group>1</space_group>
        </symmetry>
        <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
        <dimensions>
            <col>1024</col>
            <row>1024</row>
            <sec>768</sec>
        </dimensions>
        <origin>
            <col>-512</col>
            <row>-512</row>
            <sec>-384</sec>
        </origin>
        <spacing>
            <x>1024</x>
            <y>1024</y>
            <z>768</z>
        </spacing>
        <cell>
            <a units="Å">6498.6797</a>
            <b units="Å">6498.6797</b>
            <c units="Å">4874.01</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>-36.164279999999998</minimum>
            <maximum>25.314999</maximum>
            <average>-0.59346265</average>
            <std>4.7027507</std>
        </statistics>
        <pixel_spacing>
            <x units="Å">6.346367</x>
            <y units="Å">6.346367</y>
            <z units="Å">6.346367</z>
        </pixel_spacing>
        <contour_list>
            <contour primary="true">
                <source>AUTHOR</source>
            </contour>
        </contour_list>
        <label>::::EMDATABANK.org::::EMD-71864::::</label>
        <annotation_details>Sheet-like aggregate from 20 DIV embryonic rat cortical neurons</annotation_details>
    </map>
</emd>
