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Fig. 4 | Acta Veterinaria Scandinavica

Fig. 4

From: Age-related changes in the shell gland and duodenum in relation to shell quality and bone strength in commercial laying hen hybrids

Fig. 4

Localisation of active carbonic anhydrase (CA) in shell gland of Lohmann Selected Leghorn (LSL) and Lohmann Brown (LB) hens at different ages during a production period. Active CA is shown as black staining. Shell gland mucosal fold of 70-week-old LSL hens shows no detectable staining for CA in surface epithelium (S). Intense membrane-bound staining of endothelial cells (arrow) in capillaries and weak membrane-bound staining of tubular glands (G and arrowhead) can be seen. Bar = 20 µm. Weak azure blue counterstain

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