Table I. Fluorescent tags used to mark the various cellular compartments.

Compartment	Fluorescent Tag(s)	Reference
ER	pEYFP-ER	CLONTECH Laboratories Inc.
Golgi apparatus	pECFP-Golgi	Llopis et al., 1998
Post-Golgi vesicles	H-EGFP	Rivera et al., 2000
Early endosomes	VAMP8-ECFP	Nagamatsu et al., 2001
Late endosomes	Rab7-ECFP	Barbero et al., 2002
Lysosomes	Synaptotagmin VII-EGFP; LAMP1-EGFP;   CD63-EGFP; VAMP7-ECFP; dextrans	Martinez et al., 2000; Blott et al., 2001