Cell membrane ; Multi-pass membrane protein . Cytoplasm . Golgi apparatus . Cytoplasmic vesicle, secretory vesicle, synaptic vesicle . According to some authors, it is an integral membrane protein, while others showed that it is cytoplasmic and membrane-associated to Golgi and synaptic vesicles. .
Ubiquitous. Strongest expression found in placenta, pituitary gland, kidney, lung and stomach.