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4ycb is a 2 chain structure with sequence from Acetobacter aceti 1023. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
[A0A063X4U8_ACEAC] Catalyzes the conversion of N5-carboxyaminoimidazole ribonucleotide (N5-CAIR) to 4-carboxy-5-aminoimidazole ribonucleotide (CAIR).[HAMAP-Rule:MF_01929]