CP and cyst: CP trafficking and secretion are regulated via cysteine protease binding family protein (CPBF) 1 (Furukawa et al., 2012; Nakada-Tsukui et al., 2012; Marumo et al., 2014), Rab GTPases (Saito-Nakano et al., 2004, 2005; Mitra et al., 2007; Hanadate et al., 2016), the retromer-like complex (Nakada-Tsukui et al., 2005), and intrinsic CP inhibitors (Sato et al., 2006), and also presumably by priming and docking of CP-containing vesicles with the exo-cyst complex that tethers at the site of exocytosis on the PM (Nakada-Tsukui et al., 2005).