Figure 4From: Possible role of the α7 nicotinic receptors in mediating nicotine’s effect on developing lung – implications in unexplained human perinatal death Positive α7 nAChR in the wall of pulmonary vessels (see arrows). One of the two vessels shown in A) is represented at higher magnification in B) – SIUDS case, 38 gestational weeks. α7 nAChR immunostain; magnification: A) 10×; B) 40×.Back to article page