the genes that code for the human major histocompatibility class i antigens , hla-a2 and hla-b7 , were introduced into human , monkey , and mouse cell lines by cotransfection with suitable biochemical markers and the fluorescence-activated cell sorter was used to identify and/or select stable cell populations expressing high surface levels of these antigens .
C0019733
hla-a2
C0086418
human