ApplicationApoptosis (phosphatidylserine) detection (see p. 7)Acetylcholine receptor probeFluid phase endocytosis tracerGM1 receptor probe; lipid raft staining, endocytic vesicle trackingCarbohydrate probe (lectin)DNA probes, TUNEL assayFilamentous actin probeDetection of biotinylated probesRecycling endosome tracerCarbohydrate probe (lectin), bacterial gram stain