1FTR:
reference: Formylmethanofuran: tetrahydromethanopterin formyltransferase from Methanopyrus kandleri - new insights into salt-dependence and thermostability., Ermler U, Merckel M, Thauer R, Shima S, Structure 1997 May 15;5(5):635-46. PMID: 9195883

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