Endoplasmic reticulum membrane ; Multi-pass membrane protein . Cytoplasmic vesicle, clathrin-coated vesicle membrane ; Multi-pass membrane protein .
Expressed in circumvallate papillae and testis (PubMed:16720576). Expressed in the retina. Isoform 1 is predominantly present in mature optic cups. Isoform 1 expression is confined to the cell body and inner segment of developing rod photoreceptor cells (PubMed:27889058).