1E14:
reference: Structural consequences of the replacement of glycine M203 with aspartic acid in the reaction center from Rhodobacter sphaeroides., Fyfe PK, Ridge JP, McAuley KE, Cogdell RJ, Isaacs NW, Jones MR, Biochemistry 2000 May 23;39(20):5953-60. PMID: 10821666

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