Table 2.

Semiquantitative expression of mucins during human salivary gland morphogenesis and in fully developed salivary glands

	MUC1	MUC2	MUC3	MUC4	MUC5AC	MUC5B	MUC6	MUC16
Developing human salivary gland
(80 sp)
Initial bud (6 sp)
Epithelial cells	+	0	0	0	0	0	0	0
Stroma	0	0	0	0	0	0	0	0
Pseudoglandular (24 sp)
Luminal space	+++	0	0	0	0	0	0	+
Ductal cells	+	0	+	+	0	+	0	0
Canalicalicular (40 sp)
Luminal space	+++	0	0	+	0	0	0	++
Ductal cells	+	0	++	0	0	++	0	0
Terminal bud (10 sp)
Acinar cells	0	0	0	0	0	0	0	+++
Ductal cells	+++	0	++	+	0	+++	0	0
Luminal space	+++	0	0	++	0	0	0	++
Adult salivary glands
(6 sp)
Acinar cells	+++	0	+	+	0	0	0	+++
Ductal cells	0	0	+	+++	0	+++	0	0
Luminal space	+	0	0	0	0	0	0	0
Blood vessels	0	0	+++	+++	0	++	0	0

+, weak expression; ++, moderate expression; +++, strong expression; 0, negative; sp, specimens.