Anti-Relaxin 2 antibodies are used in the immunodetection of the protein encoded by the RLN2 gene. In humans, the canonical protein has a reported length of 185 amino acid residues and a mass of 21 kDa. It is known to be a secreted protein. Alternative splicing is reported to yield 2 different isoforms for this protein. A member of the Insulin protein family, it is known to be involved with the regulation of angiogenesis and the regulation of gene expression. Other names for this target antigen include H2-RLX, RLXH2, bA12D24.1.1, bA12D24.1.2, prorelaxin H2, H2-preprorelaxin, relaxin H2, and H2.