valgud, mis ekspresseeruvad leukotsüütide, vereliistakute ning epiteeli- ja endoteelirakkude pinnal, Junctional adhesion molecules (JAMs) are members of an immunoglobulin subfamily expressed by leukocytes and platelets as well as by epithelial and endothelial cells, in which they localize to cell-cell contacts and are specifically enriched at tight junctions.