Anti-Protamine 2 antibodies are used for the immunodetection of the protein encoded by the PRM2 gene. In humans, the canonical protein has a reported length of 102 amino acid residues and a mass of 13.1 kDa. Its subcellular localization is in the nucleus. Alternative splicing is reported to yield 2 different isoforms for this protein. It is notably expressed in the testis. A member of the Protamine P2 protein family, it is known to be involved with spermatid development and spermatogenesis. Post-translational modifications have been described, including protein cleavage. Other names for this target antigen include cancer/testis antigen family 94, member 2, sperm histone P2, sperm protamine P2, testicular secretory protein Li 40, and CT94.2. Gene orthologs have been identified in the mouse, rat, bovine and chimpanzee species. A number of Protamine 2 antibodies have been mentioned in research publications and have associated citations. Western Blot is a widely used application for these antibodies. In addition, Immunohistochemistry is also a common application.