Anti-meiosis inhibitor 1 antibodies enable researchers to detect and measure the meiosis inhibitor 1 antigen in biological samples. This target is a reported synonym of the MEI1 gene, which encodes meiotic double-stranded break formation protein 1. This protein is reported to be required for normal meiotic chromosome synapsis. The human version of meiosis inhibitor 1 has a canonical amino acid length of 1274 residues and a protein mass of 141.2 kilodaltons, although 7 isoforms have been identified. It is reported to be notably expressed in many tissues, such as the colon, vagina, and cervix. Other names for this target antigen include meiosis inhibitor protein 1, meiosis defective 1, and meiosis defective protein 1.