BPIFA1 and BPIFB1 are not expressed in the major salivary glands of the mouse. Immunohistochemistry for BPIFA1 (a, b), BPIFB1 (c, d) and BPIFA2E (e, f) was performed in serial sections of sublingual gland (a, c, e) and parotid and submandibular glands (b, d, f) as described in materials and methods section. SGM – submandibular gland; Par – parotid gland