1LBM:
reference: Two (betaalpha)(8)-barrel enzymes of histidine and tryptophan biosynthesis have similar reaction mechanisms and common strategies for protecting their labile substrates., Henn-Sax M, Thoma R, Schmidt S, Hennig M, Kirschner K, Sterner R, Biochemistry 2002 Oct 8;41(40):12032-42. PMID: 12356303

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