MYO5A and piebaldism: In humans, three paralogous genes encode for class V myosins: MYO5A, MYO5B, and MYO5C. Defects in the MYO5A gene are related to the Griscelli syndrome type 1 (also known as Elejalde syndrome) [11,12], which is characterized by partial albinism and severe neurological disorders.