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7z6r is a 4 chain structure with sequence from Psychrobacter arcticus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
HISZ_PSYA2 Required for the first step of histidine biosynthesis. May allow the feedback regulation of ATP phosphoribosyltransferase activity by histidine.[HAMAP-Rule:MF_00125]