Anti-SRM antibodies are used in the immunodetection of the protein spermidine synthase. In humans, the canonical protein has a reported length of 302 amino acid residues and a mass of 33.8 kDa. It is notably widely expressed in many tissue types. A member of the Spermidine/spermine synthase protein family, SRM is known to catalyze the production of spermidine from putrescine and decarboxylated S-adenosylmethionine (dcSAM). Synonyms for this target antigen include SPDSY, SPS1, SRML1, putrescine aminopropyltransferase, spermidine synthase-1, and PAPT. SRM gene orthologs have been reported in the mouse, rat, bovine, frog, zebrafish, chimpanzee and chicken species. A number of SRM antibodies have been mentioned in research publications and have associated citations. Western Blot is a widely used application for these antibodies. In addition, ELISA is also a common application.