iw.2 was shown to express igm , b1 ( cd20 ) , and 12 ( a major histocompatibility complex class ii antigen ) molecules on the cell membrane by analysis of flow microfluorometry ( fmf ) as well as a receptor for the third component of complement ( c3r ) , but not to express an epstein-barr virus nuclear antigen .
C0019630
major histocompatibility complex class ii
C0007603
cell membrane