LAMP1 and infection: However, we also noticed that a portion of Rab32-positive phagosomes are free of late endosomal markers (LAMP1 and LAMP2) and late endosomal/lysosomal probe (Lysotracker) from 1 to 6 h after infection (Fig 4D, 4E and 4G), suggesting that not all Rab32-positive phagosomes are fused with late endosomes.