Carbonic anhydrase—a marker for particles shed from the epithelium to the lymphoid follicles of the ileal Peyer's patch in goat kids and lambs

Abstract
Carbonic anhydrase (CA) was found to be a marker for 50 nanometer membrane-bounded particles shed from the lateral cell border of follicle-associated epithelial cells (FAE) in the ileal Peyer's patch (PP) of pre- and post-natal lambs and goat kids. The CA-positive particles seemed to filter into the underlying lymphoid tissue where they formed part of the matrix embedding the cells of the follicle centre.