Anti-calcium-binding protein, spermatid-specific 1 antibodies enable researchers to detect and measure the calcium-binding protein, spermatid-specific 1 antigen in biological samples. This target is a reported synonym of the CABS1 gene, which encodes calcium binding protein, spermatid associated 1. This protein is known to function in spermatogenesis, among other biological roles. The human version of calcium-binding protein, spermatid-specific 1 has a canonical amino acid length of 395 residues and a protein mass of 43 kilodaltons. It is reported to be localized in the cytoplasmic vesicles, mitochondria, and cytoplasm of cells and notably expressed in the testis. Other names for this target antigen include calcium-binding, and spermatid-specific protein 1, calcium-binding protein, sperm-specific 1, and calcium-binding protein, spermatid-specific 1.