3SLE:
reference: Proline 107 is a major determinant in maintaining the structure of the distal pocket and reactivity of the high-spin heme of MauG., Feng M, Jensen LM, Yukl ET, Wei X, Liu A, Wilmot CM, Davidson VL, Biochemistry. 2012 Feb 28;51(8):1598-606. Epub 2012 Feb 10. PMID: 22299652

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