Table 2.

Lectin labelling patterns and histochemical staining of the gastrointestinal tract of P. pipistrellus. Staining intensities and locations are given. For PAS-AB observed colour and mucus characteristics are specified.

	Lectin				Stain
	WGA		HPA		PAS		PAS-AB	pH 2.5
Esophagus
Mucous surface cells	+++	S	+++	S	+++	+++	(m)	N
Lumen mucus	++		-		+++	+++	(m)	N
Stomach
Mucous surface cells	+++	S	-		+++	+++	(m)	N
Chief cells	+++	S	+++	C	-	-
Neck cells	++	S	-		+	+	(p)	M
Parietal cells	++	S	+	S	++	++	(p)	M
Lumen mucus	-		++		+++	+++	(m/p)	N/M
Duodenum
Enterocytes	+	S	+	S	+	+	(m)	N
Goblet cells	+++	C	+	S	+++	+++	(p)	M
Jejunum-ileum
Enterocytes	-		+	S	+	+	(m)	N
Goblet cells	+++	C	+	C	+++	+++	(p)	M
Lumen mucus	+++		+++		+++	+++	(p)	M
Ileum-colon
Enterocytes	+++	S	++	S	+	+	(m)	N
Goblet cells	+++	C	+	C	+++	+++	(p/b)	M/A
Lumen mucus	+++		+		+++	+++	(p/b)	M/A
Colon-rectum
Enterocytes	+	S	-		+++	+++	(m/p)	N/M
Goblet cells base of crypts	+	S	+	S	+++	+++	(b)	A
Goblet cells top of crypts	+	S	+	S	+++	+++	(p/m)	M/N
Lumen mucus	+++		-		+++	+++	(b-p-m)*	A-M-N*

+++, strong positive; ++, positive; +, weak positive; -, negative; S, surface; C, cytoplasm; m, magenta; p, purple; b, blue; N, neutral carbohydrates; M, mixed carbohydrates; A, acid carbohydrates;

*, from the base to top of the crypt.