Proliferative response of K^b-CD28-ζ and K^b-CD28[L→G]-ζ RMTCs. GFP-sorted CD8⁺ RMTCs were stimulated 7 days after transduction with irradiated splenocyte feeders on plates coated with AF6-88.5 anti-H-2K^b or in the presence of the nonspecific mitogen conA. After 2 days the cultures were pulsed with ³H-thymidine and harvested 16 hours later. Data points are means of triplicate samples. Error bars show ± 1 SD. One of 3 essentially identical experiments is shown.