Rat monoclonal antibody isotype IgG2a (clone #153) recognizes the HA peptide sequence [YPYDVPDYA] derived from the influenza hemagglutinin protein. The HA peptide can be added to unrelated proteins through recombinant techniques.
This antibody(MEL-14) is specific for a single class of lymphocyte surface molecules that appear to mediate recognition of lymph node high endothelial venules and that appear to be required for lymphocyte homing to lymph nodes in vivo.