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            <header_release>2025-04-16</header_release>
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                <funding_body>National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)</funding_body>
                <code>R01GM143773</code>
                <country>United States</country>
            </grant_reference>
        </grant_support>
        <title>Subtomogram average of hemagglutinin from influenza A virions incubated with 6.5 mM LSTc</title>
        <authors_list>
            <author ORCID="0000-0001-5107-2336">Huang QJ</author>
            <author ORCID="0000-0003-2270-6613">Schiffer CA</author>
        </authors_list>
        <keywords>Hemagglutinin, VIRAL PROTEIN</keywords>
    </admin>
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        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author ORCID="0000-0001-5107-2336" order="1">Huang QJ</author>
                    <author order="2">Kim R</author>
                    <author order="3">Song K</author>
                    <author ORCID="0000-0002-1506-909X" order="4">Grigorieff N</author>
                    <author ORCID="0000-0001-7634-4633" order="5">Munro JB</author>
                    <author ORCID="0000-0003-2270-6613" order="6">Schiffer CA</author>
                    <author order="7">Somasundaran M</author>
                    <title>Virion-associated influenza hemagglutinin clusters upon sialic acid binding visualized by cryoelectron tomography.</title>
                    <journal_abbreviation>Proc.Natl.Acad.Sci.USA</journal_abbreviation>
                    <country>US</country>
                    <volume>122</volume>
                    <first_page>e2426427122</first_page>
                    <last_page>e2426427122</last_page>
                    <year>2025</year>
                    <external_references type="PUBMED">40244672</external_references>
                    <external_references type="DOI">doi:10.1073/pnas.2426427122</external_references>
                    <external_references type="ISSN">1091-6490</external_references>
                    <external_references type="CSD">0040</external_references>
                    <external_references type="ASTM">PNASA6</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
    </crossreferences>
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                <details>Virus produced in embryonated eggs and purified from allantoic fluid.</details>
                <sci_species_name ncbi="211044">Influenza A virus (A/Puerto Rico/8/1934(H1N1))</sci_species_name>
                <virus_type>VIRION</virus_type>
                <virus_isolate>STRAIN</virus_isolate>
                <virus_enveloped>true</virus_enveloped>
                <virus_empty>false</virus_empty>
            </virus_supramolecule>
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            <method>subtomogramAveraging</method>
            <aggregation_state>particle</aggregation_state>
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                        <ph>7.4</ph>
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                        <material>COPPER</material>
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                            <film_material>CARBON</film_material>
                            <film_topology>HOLEY</film_topology>
                        </support_film>
                    </grid>
                    <vitrification>
                        <cryogen_name>ETHANE-PROPANE</cryogen_name>
                    </vitrification>
                    <details>Virus was incubated with Sialylneolacto-N-tetraose c (LSTc) at a final concentration of 6.5 mM</details>
                </subtomogram_averaging_preparation>
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                    <microscope>FEI TITAN KRIOS</microscope>
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                    <imaging_mode>BRIGHT FIELD</imaging_mode>
                    <electron_source>FIELD EMISSION GUN</electron_source>
                    <acceleration_voltage units="kV">300</acceleration_voltage>
                    <nominal_cs units="mm">2.7</nominal_cs>
                    <nominal_defocus_min units="µm">3.0</nominal_defocus_min>
                    <nominal_defocus_max units="µm">6.0</nominal_defocus_max>
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                            <film_or_detector_model>GATAN K3 (6k x 4k)</film_or_detector_model>
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                            <version>4</version>
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