Fig. 4From: Localization of neonatal Fc receptor for IgG in aggregated lymphoid nodules area in abomasum of Bactrian camels (Camelus bactrianus) of different agesLocalization of FcRn in LMFR of fetus’ abomasum ALNA. From left to right column, the paraffin sections were stained with hematoxylin and eosin (H&E), immunohistochemistry for FcRn, hematoxylin counterstain (as negative control), respectively. a non-FAE represents non-follicle-associated epithelium in the top panel, and FcRn positive expression was mainly distributed in membrane of the epithelial cells (arrow); b FAE represents follicle-associated epithelium in the second panel from top to bottom, and FcRn positive expression was mainly distributed in membrane of the epithelial cells (arrow); c pLF represents primary lymphatic follicles in the third panel (star), and typical macrophages and dendritic cells (DCs) with high FcRn expression were not observed; d Vessel, FcRn was highly expressed both in vascular endothelial cells and smooth muscle cells (arrow); e Smooth muscle, FcRn was also highly expressed in basement membrane of smooth muscle (arrow). Original magnification: 400×Back to article page