Fig. 4

Pathology slides at 20x magnification of parotid glands infused with plasmid vectored EGFP. Note absence of expression of EGFP (no red stain) in parotid tissue infused with plasmid vectored EGFP
Pathology slides at 20x magnification of parotid glands infused with plasmid vectored EGFP. Note absence of expression of EGFP (no red stain) in parotid tissue infused with plasmid vectored EGFP