2.1.1.45 thymidylate synthase GM00637 cell normal human fibroblast cell line immortalized by SV40 692016 2.8.2.1 aryl sulfotransferase GM00637 cell - 760813 4.2.99.18 DNA-(apurinic or apyrimidinic site) lyase GM00637 cell fibroblasts 694162