- Golgi-localizing, gamma-adaptin ear homology domain, ADP-ribosylation factor-binding (GGA) proteins interact with acidic dileucine sequences within the cytoplasmic domains of sorting receptors through their Vps27p/Hrs/STAM (VHS) domains. Takatsu, H., Katoh, Y., Shiba, Y., Nakayama, K. J. Biol. Chem. (2001)