Anti-EYCL antibodies are protein reagents that detect specific antigens. The EYCL antigen is another term for the human protein OCA2 melanosomal transmembrane protein, encoded by the OCA2 gene. The protein is known to function in cell proliferation and melanocyte differentiation, among other biological roles. Canonically, it has an amino acid length of 838 residues and a mass of 92.9 kilodaltons. Its subcellular localization is in the membrane and it is reported to be expressed in melanocytes and retinal pigment epithelium. The EYCL protein is a member of the CitM (TC 2.A.11) transporter protein family. Other alias names for EYCL include BEY, BEY1, and BEY2.