Description_x000D_ General description_x000D_ Protein arginine methyl transferase 1 (PRMT1) is a 361 amino acid protein; its splicing variants differ at the N-terminus, giving rise to three isoforms of 343, 361, and 347 amino acids (variants 1, 2, and 3 respectively)._x000D_ Immunogen_x000D_ synthetic peptide corresponding to amino acids 309-324 of rat PRMT1 conjugated to KLH via an N-terminal added cysteine residue. This sequence is conserved in human and rat._x000D_ Physical form_x000D_ Solution in 0.01 M phosphate buffered saline, pH 7.4, containing 15 mM sodium azide._x000D_ Disclaimer_x000D_ Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals._x000D_ Biochem/physiol Actions_x000D_ Protein arginine methyl transferase (PRMT) family of enzymes catalyzes the methylation of arginine during post translational modification. These enzymes transfer the methyl group from S-adenosyl-L-methionine to the guanidino nitrogen atoms of an arginine residue. PRMTs are divided in two major types, I and II. Both types catalyze the formation of monomethylarginine, but differs in that Type I (including PRMT1, 3, 4, and 6) catalyzes the formation of asymmetric dimethylarginine, whereas type II (PRMT5) catalyzes the formation of symmetric dimethylarginine. Proteins involved in the metabolism of RNA like 68-kDa Src-associated substrate in mitosis (Sam68) are substrates for PRMT1.