sentence: The exocyst is a multiprotein complex involved in plasma-membrane docking of secretory vesicles , containing eight components : Sec3 / Exoc1 , Sec5 / Exoc2 , Sec6 / Exoc3 , Sec8 / Exoc4 , Sec10 / Exoc5 , Sec15 / Exoc6 , Exo70 / Exoc7 , and Exo84 / Exoc8 ( Heider and Munson , 2012 ; Wu and Guo , 2015 ) .