KLC1 and infection: Consistent with these proteins being functional, immunofluorescence confocal microscopy showed that in HeLa cells infected with vA5L-GFP both Flag-KLC1 and Flag-KLC2 co-localised with GFP-positive virions at the cell periphery late (8 h) during infection, similar to their endogenous counterparts (Fig. 2B, inserts).