TY - RPRT TI - Harnessing the biosynthetic code: combinations, permutations, and mutations. AU - D E Cane AU - C T Walsh AU - C Khosla PY - 1998 DO - 10.1126/science.282.5386.63 UR - https://pubmed.ncbi.nlm.nih.gov/9756477/ ID - 9756477 ER -