APC CORECEPTOR ANTIGEN CD4 NONSPECIFIC D4 T CELL SIGNAL TCRI RECEPTOR #1 ACTIVATION PEPTIDE SPECIFIC CO-STIMULATOR siGNAL "ARMED B7 ANTIGEN- EFFECTOR CD28 NONSPECIFIC #2 Th CELL Nave“ unactivated”cD4Tcel becomes“ ACTIVATED”2021年2月5日星期五9 时17分11秒