GPR143 and albinism: Since 1986, we have proposed that DOPA may itself also function as a neurotransmitter [1, 2, 3] Several lines of evidence suggest that G protein‐coupled receptor 143 (GPR143), originally identified as the gene product of ocular albinism 1 (OA1), an X‐linked type of albinism [4], acts as a receptor for DOPA [3, 5].