Thymidylate synthase thyA Provides the sole de novo source of dTMP for DNA biosynthesis (By similarity). MKAYLDLMRHVLDNGTDKSDRTGTGTLSVFGYQMRFDLGKGFPLLTTKKLHLRSIIHELLWFLKGDTNIKYLKDNNVSIWDDEWADENGDLGPVYGYQWRSWPAPDGRHIDQIANVVEQIKKNPDSRRLIVSAWNPALVDEMALPPCHALFQFYVADGNLSCQLYQRSADIFLGVPFNIASYALLTMMMAQVCGLEAGEFVHTFGDAHLYRNHFEQAALQLEREPRALPVMKINPEVKDLFAFKFEDFELEGYDPHPHIKAVVSV TYSY_NEIGO 265