whereas 2.5 % of cell-surface il-2r expressed 2 days after antigenic stimulation of 2b11 cells were of high affinity for il-2 ( kd = 25 pm ) , no ( less than 0.07 % ) high affinity binding sites could be detected on the purified soluble il-2r .
C0699040
of cell-surface
C0007634
cells