5YRP:
reference: The GDP-switched GAF domain of DcpA modulates the concerted synthesis/hydrolysis of c-di-GMP in Mycobacterium smegmatis., Chen HJ, Li N, Luo Y, Jiang YL, Zhou CZ, Chen Y, Li Q, Biochem J. 2018 Apr 9;475(7):1295-1308. doi: 10.1042/BCJ20180079. PMID: 29555845

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