autoreactive ( fisher ) and alloreactive ( buffalo ) t cell lines and isolated cd4+ t cells derived from these lines , which were developed against fisher rat spleen cells , similarly recognized mhc class ii ag expressed on 1b-6 cells but had no detectable response to 1b-6 mhc class ii-negative thyrocytes or mhc class ii-positive human thyroid cells .
C0017349
mhc class ii
C0086418
human