This structure produces a prominent clear perinuclear hof in plasma cells. GM130 is believed to assist in the assembly of this structure, which also appears to require GRASP proteins. The GRAB-domain helps localize proteins to this structure by binding to ARF1. This structure is the destination of (*) COPII (10[1]-5[1])coated (10[1])vesicles, which undergo (10[1])anterograde (10[1])transport. Round-headed, infertile sperm form due to the inability of this organelle to develop into the acrosome. This organelle is the primary site of O-linked glycosylation. Proteins from the ER are transported (10[1])to the (10[1])cis face of this (10[1])structure (10[1])in preparation for secretion. For 10 points, name this organelle that packages and modifies proteins. ■END■