1F75:
reference: Crystal structure of cis-prenyl chain elongating enzyme, undecaprenyl diphosphate synthase., Fujihashi M, Zhang YW, Higuchi Y, Li XY, Koyama T, Miki K, Proc Natl Acad Sci U S A 2001 Apr 10;98(8):4337-42. PMID: 11287651

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