LAMP1 and infection: Fractions that revealed bands when stained with anti-V Abs also demonstrated staining with (1) late endosomal antigen M6P (31kD) after 30 min of infection with SMI-pretreated CO92 pPst- pgm- (Fig. 3, panel B), (2) lysosomal marker Lamp-1 (120 kD) after 2 h with SMI-pretreated CO92 pPst- pgm- (Fig. 3, panel C), (3) mitochondria protein VDAC-1 (31 kD) after 3 h (Fig. 3, panel E) with (a) CO92 pPst- pgm-, (b) Y. ptb.