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©2013 UpToDate ® Print Email Molecular classification of albinism Type of albinism Responsible gene Gene location Oculocutaneous albinism (OCA) OCA1 Tyrosinase 11q14-q21 OCA2 OCA2 ( P gene) 15q11-q12 OCA3 Tyrosinase-related protein 1 9p23 OCA4 SLC45A2 * 5p13 Ocular albinism (OA) OA1 GPR143 Xp22.3 OA2 CACNA1F Xp11.23 * Also known as MATP gene, encoding membrane-associated transporter protein. Data modified and reproduced with permission from: Summers CG. Albinism: Classification, clinical characteristics, and recent findings. Optom Vis Sci 2009; 86:659. Copyright © 2009 Lippincott Williams & Wilkins.