the increase in [ ca++ ] i following activation via some t cell surface antigen is predominantly due to intracellular mobilization of ca++ ( e.g . cd3/tcr complex ) , whereas activation via other t cell surface antigen , the increase in [ ca++ ] i is almost entirely due to an influx of extracellular calcium ( e.g . cd5 antigen ) .
C0108779
cd3
C0034790
tcr