1NP7:
reference: Identification of a new cryptochrome class. Structure, function, and evolution., Brudler R, Hitomi K, Daiyasu H, Toh H, Kucho K, Ishiura M, Kanehisa M, Roberts VA, Todo T, Tainer JA, Getzoff ED, Mol Cell 2003 Jan;11(1):59-67. PMID: 12535521

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