!gaf-version: 2.0 SGN_gene 8256 pmt2 PO:0009005 PMID:19055544 IEP NCBI_gi:193792544 A putrescine N-methyltransferase 2 gene taxon:243963 20090702 SGN SGN_gene 8257 pmt1 PO:0009005 PMID:19055544 IEP NCBI_gi:193792542 A putrescine N-methyltransferase 1 gene taxon:243963 20090702 SGN