Immunogen sequence: SGDHSELSQN PKQASPREEL HYASVVFDSN TNRIAAQRPR EEEPDSDYSV IRK. The CMRF35 antigen (CMRF35A; MIM 606786), which was identified by reactivity with a monoclonal antibody, is present on monocytes, neutrophils, and some T and B lymphocytes. C