Anti-SAMP32 antibodies enable researchers to detect and measure the SAMP32 antigen in biological samples. This target is a reported synonym of the SPACA1 gene, which encodes sperm acrosome associated 1. This protein is reported to play a role in acrosome expansion and establishment of normal sperm morphology during spermatogenesis (By similarity). The human version of SAMP32 has a canonical amino acid length of 294 residues and a protein mass of 32.1 kilodaltons. It is reported to be localized in the cytoplasmic vesicles of cells and notably expressed in the testis.