<p>HEV express CD34 and GlyCAM-1 which bind to L-selectin on naive lymphocytes. This allows circulating [[Lymphocytes|lymphocytes]] to recognise when they have reached a [[:Category:Secondary Lymphoid Tissue|secondary lymphoid organ]] and they leave the bloodstream, entering the lymphatic tissue.</P> | <p>HEV express CD34 and GlyCAM-1 which bind to L-selectin on naive lymphocytes. This allows circulating [[Lymphocytes|lymphocytes]] to recognise when they have reached a [[:Category:Secondary Lymphoid Tissue|secondary lymphoid organ]] and they leave the bloodstream, entering the lymphatic tissue.</P> |