Anti-PRMT1 antibodies are used in the immunodetection of the protein protein arginine methyltransferase 1. In humans, the canonical protein has a reported length of 371 amino acid residues and a mass of 42.5 kDa. Its subcellular localization is in the nucleus and cytoplasm. Up to 4 different isoforms have been reported for this protein. It is widely expressed across many tissue types. A member of the Protein arginine N-methyltransferase protein family, PRMT1 is reported to be an arginine methyltransferase that methylates (mono and asymmetric dimethylation) the guanidino nitrogens of arginyl residues present in proteins such as ESR1, histone H2, H3 and H4, FMR1, ILF3, HNRNPA1, HNRNPD, NFATC2IP, SUPT5H, TAF15, EWS, HABP4, SERBP1, RBM15, FOXO1, CHTOP and MAP3K5/ASK1. Synonyms for this target antigen include HCP1, IR1B4, protein arginine N-methyltransferase 1, HMT1 (hnRNP methyltransferase, S. cerevisiae)-like 2, and ANM1. Over 90 citations in the literature describe the use of PRMT1 antibodies in research. Western Blot is a widely used application for these antibodies. In addition, Immunohistochemistry is also a common application.