Description: This YKIX322.3 monoclonal antibody reacts with canine CD5, also known as Ly-1. CD5 is a 67-kDa type I transmembrane glycoprotein expressed on thymocytes and mature T cells. Studies have demonstrated that NK cells in dogs also express CD5, but at lower levels. In dogs, CD5 is not detectable on B cells or B cell lines.