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Class: Mainly Alpha (13335)
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Architecture: Orthogonal Bundle (10391)
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Topology: GTP Cyclohydrolase I; Chain A, domain 1 (23)
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Homologous Superfamily: [code=1.10.286.10, no name defined] (14)
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Human (Homo sapiens) (1)
1FB1A:57-116; B:57-116; C:57-116; D:57-116; E:57-116CRYSTAL STRUCTURE OF HUMAN GTP CYCLOHYDROLASE I