4J72:
reference: Crystal structure of MraY, an essential membrane enzyme for bacterial cell wall synthesis., Chung BC, Zhao J, Gillespie RA, Kwon DY, Guan Z, Hong J, Zhou P, Lee SY, Science. 2013 Aug 30;341(6149):1012-6. doi: 10.1126/science.1236501. PMID: 23990562

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