Coexpression of SNAP-25(C85A,C88A,C90A,C92A) disrupts LC/A plasma membrane localization. Upper panel, Neuro-2A cells were transfected with pLC/A (blue) alone (SN-Endo) or with pSNAP-25 (SN-YFP) or pSNAP-25(C85A,C88A,C90A,C92A)-YFP (SN(4CM)). Cells were washed, fixed, permeabilized, and probed with α-SNAP-25 antibody (SN-Endo) and subjected to confocal microscopy alone or merged. Lower panel, greater than 100 cells were visually scored for cytosolic LC/A upon each transfection treatment. Numbers are the average of three independent experiments. Error bars indicate S.D. SN, SNAP-25.