6Z5L:
reference: The native structure of the assembled matrix protein 1 of influenza A virus., Peukes J, Xiong X, Erlendsson S, Qu K, Wan W, Calder LJ, Schraidt O, Kummer S, Freund SMV, Krausslich HG, Briggs JAG, Nature. 2020 Sep 9. pii: 10.1038/s41586-020-2696-8. doi:, 10.1038/s41586-020-2696-8. PMID: 32908308

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