Prominent synthesis of VAP-1 in embryonic lung and adrenal gland. Representative immunohistochemical stainings from fetal (13 weeks) and postnatal (2 months) lungs and fetal adrenal glands (13 and 23 weeks) are shown. Adjacent sections of the lungs were stained for VAP-1 and CD31 (an endothelial marker). Scale bar indicates 50 μm. Objective magnification for all images, 20×.