ZAC; ARF GTPase activator/ phospholipid binding; ADP-ribosylation factor GTPase-activating protein containing zinc finger and C2 domains and a novel PI-3-P-binding protein region. Binds PI-3-P. Highest expression levels in flowering tissue, rosettes and roots. A member of ARF GAP domain (AGD), A thaliana has 15 members, grouped into four classes. ; GTPase-activating protein (GAP) for ADP ribosylation factor (ARF). Binds phosphatidylinositol 3-monophosohate (PI-3-P) and anionic phospholipids (337 aa)