Saccharomyces cerevisiae - Functional Catalogue   biosynthesis of secondary products derived from primary amino acids (4 ORFs) YOL052c SPE2 adenosylmethionine decarboxylase precursor YKL184w SPE1 ornithine decarboxylase YPR069c SPE3 putrescine aminopropyltransferase (spermidine synthase) YLR146c SPE4 spermine synthase Back to MIPS Yeast Functional Categories Page. Back to MIPS Genome Project Page. Back to MIPS Homepage. mail questions/comments to webmaster