thyE 318 thyA Provides the sole de novo source of dTMP for DNA biosynthesis (By similarity). MYNPFDEAYHGLCEEILEIGNRRDDRTHTGTISKFGHQLRFDLTKGFPLLTTKKVSFKLVATELLWFIKGDTNIQYLLKYNNNIWNEWAFENYVQSDDYHGPDMTDFGHRSQQDPEFNEQYKEEMKKFKERILNDDAFAKKYGNLGNVYGKQWRDWEDKNGNHYDQLKSVIQQIKTNPNSRRHIVSAWNPTEIDSMALPPCHTMFQFYVQEGKLNCQLYQRSADIFLGVPFNIASYALLTHLVAKECGLEVGEFIHTFGDAHIYSNHMDAIHTQLSRDSYLPPQLKINTDKSIFDINYEDLELINYESHPAIKAPIAV thyF TYSY_STAAU Thymidylate synthase