Searching for Enyzme Commission number 2.5.1.23 (Sym-norspermidine synthase.) by Reannotation, by TIGRFam, by KEGG ortholog group, by SEED annotation, or by best hit in MetaCyc

No gene found for ec:2.5.1.23 in Escherichia coli BL21

Or search for '2.5.1.23' in Escherichia coli BL21 using Curated BLAST