A quatrefoil tethering complex required for retrograde traffic from the early endosome back to the late Golgi and biogenesis of cytoplasmic vesicles. [ http://www.ncbi.nlm.nih.gov/pubmed/12077354 http://www.ncbi.nlm.nih.gov/pubmed/10637310 http://www.ncbi.nlm.nih.gov/pubmed/12446664 ]