OCA2 and oculocutaneous albinism: Currently, there are seven different types of OCA caused by genetic alterations in different proteins: TYR (OCA1), OCA2-Melanosomal Transmembrane Protein (OCA2), TYRP1 (OCA3), Soluble Carrier Family 45 Member 2 (SLC45A2)/Membrane Associated Transporter, MATP (OCA4), Soluble Carrier Family 24 Member 5 (SLC24A5) (OCA6), and Leucine-Rich Melanocyte Differentiation Associated (LRMDA) (OCA7).