Anti-SPIN antibodies enable researchers to detect and measure the SPIN antigen in biological samples. This target is a reported synonym of the SPIN1 gene, which encodes spindlin 1. This protein is known to function in chromatin organization and the regulation of transcription, among other biological roles. The human version of SPIN has a canonical amino acid length of 262 residues and a protein mass of 29.6 kilodaltons. It is reported to be localized in the nucleus of cells. SPIN is a member of the SPIN/STSY protein family.