Calcium, potassium:sodium antiporter that transports 1 Ca(2+) and 1 K(+) to the melanosome in exchange for 4 cytoplasmic Na(+) . Involved in pigmentation, possibly by participating in ion transport in melanosomes . Predominant sodium-calcium exchanger in melanocytes .
Golgi apparatus, trans-Golgi network membrane ; Multi-pass membrane protein . Melanosome . Enriched in late-stage melanosomes. .
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