A protein complex required for the biogenesis of specialized organelles of the endosomal-lysosomal system, such as melanosomes and platelet dense granules. The human complex contains the Hps3, Hps5, and Hps6 proteins; the mouse complex contains ru2 and ru.
Source:PMID:12548288,
PMID:15031569,
PMID:14718540