In the last sentence of the Abstract, the term “trans-soluble NSF attachment protein (SNAP) receptor” was mistakenly abbreviated as t-SNARE. The proper abbreviation is trans-SNARE. The last sentence in the abstract should appear as follows: p115 phosphorylation may be required for the transition from COPI vesicle tethering to COPI vesicle docking, an event that involves the formation of trans-SNARE (trans–soluble NSF attachment protein [SNAP] receptor) complexes.