Neurocalcin-delta (NCALD) is a member of the recoverin family, which contains four EF-hand domains. Neurocalcin is a neuronal calcium-binding protein that belongs to the neuronal calcium sensor (NCS) family of proteins. Neurocalcin is expressed in mammalian brains and possesses a Ca2+/myristoyl switch. As for NCALD, it may be involved in the calcium-dependent regulation of rhodopsin phosphorylation. NCALD binds three calcium ions.