6G1Y:
reference: Structural snapshot of a bacterial phytochrome in its functional intermediate state., Schmidt A, Sauthof L, Szczepek M, Lopez MF, Escobar FV, Qureshi BM, Michael N, Buhrke D, Stevens T, Kwiatkowski D, von Stetten D, Mroginski MA, Krauss N, Lamparter T, Hildebrandt P, Scheerer P, Nat Commun. 2018 Nov 21;9(1):4912. doi: 10.1038/s41467-018-07392-7. PMID: 30464203

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