Description: This OX49 monoclonal antibody recognizes rat CD44H, which is also known as homing-associated cell adhesion molecule (H-CAM) or phagocytic glycoprotein-1 (Pgp-1). This isoform of CD44 is the cell surface receptor for hyaluronate, a component of the extracellular matrix. CD44H is highly expressed on hematopoietic and non-hematopoietic cells, and exists as multiple splice variants. CD44H plays a critical role in lymphocyte activation and homing.