Anti-family with sequence similarity 65 member C antibodies enable researchers to detect and measure the family with sequence similarity 65 member C antigen in biological samples. This target is a reported synonym of the RIPOR3 gene, which encodes RIPOR family member 3. The human version of family with sequence similarity 65 member C has a canonical amino acid length of 946 residues and a protein mass of 105.3 kilodaltons, although 2 isoforms have been identified. family with sequence similarity 65 member C is a member of the RIPOR protein family.