binding of 12.7g3 , as detected by immunofluorescence using flow microfluorometry , was positive for two human cell lines , gm 3161 and hfb-1 , both expressing hla-dr2 , and negative for two other cell lines , gm 3104 ( dr1,1 ) and gm 3164 ( dr4,4 ) .
C0086418
human
C1333247
dr1