Endomucin is not expressed on HEV of lymphatic tissue. Cryostat sections of mesenteric lymph nodes were incubated with MoAb V.5C7 (a) (endomucin) or MoAb MECA 367 (b) against the vascular addressin MAdCAM-1 (MAdCAM-1). Arrowheads point to HEV and arrows point to capillaries. The bar represents 50 μm.