Table 1. .

Localization of RNase 7 in normal oral epithelium

Tissue types	Location	Grading
​Parakeratinized
​ Palate (hard)	​aSurface layers of parakeratinized epithelium	​+ (positive)
​ Tongue (dorsum)	​aSurface layers of parakeratinized epithelium	​+ (positive)
​ Attached gingiva	​aSurface layers of parakeratinized epithelium	​+ (positive)
​Non-keratinized
​ Buccal mucosa	​bnone	​− (negative)
​ Lip mucosa	​bnone	​− (negative)

a: Positive staining in surface layers of parakeratinized epithelium in 6/6 of hard palate, 15/15 of tongue and 5/5 of attached gingiva specimens.

b: No positive staining seen in buccal and lip mucosa.