Reacts with platelet-endothelial cell tetraspan antigen-3 (PETA-3), a 27 kD membrane glycoprotein, expressed on platelets, megakaryocytes, lymphocytes (weak), monocytes, endothelial cells and epithelial cells. PETA-3 (CD151) associates with β1 integrin in certain tissues. This has also been shown with other tetraspan superfamily members, like CD9, CD63 and α5β1. Reports indicate that this association or colocalization of CD151 with β1 integrin in tissues suggests a functional role of this molecule, however, this role has not been elucidated yet. It has also been reported that antibody 14A2.H1 is capable of platelet activation in vitro. Studies showed that different clones of CD151 monoclonal antibodies display strikingly different patterns of binding to human haemopoietic cells and tissue sections, and that this is due at least in part to the presence of the protein in complexes with different integrins.
The antibody was conjugated to BD Horizon Red 718, which has been developed exclusively for BD Biosciences as a better alternative to Alexa Fluor® 700. BD Horizon Red 718 can be excited by the red laser (628 – 640 nm) and, with an Em Max around 718 nm, it can be detected using a 730/45 nm filter. Due to similar excitation and emission properties, we do not recommend using R718 in combination with APC-R700 or Alexa Fluor® 700.