Predominanly expressed in testis, lung and skin. Weak expression in brain and kidney. Expression in the palate increases from 12.5 up to 15.5 dpc. At 14.5, detected in the nasal epithelium and detected in the medial edge epithelium. At 15.5 dpc, very strong expression in the nasal respiratory epithelium and epidermis, but not in the oral epithelium. In the nasal epithelium, limited to the respiratory, but not the olfactory, epithelium. Truncated N-terminus. Truncated N-terminus.