Fig. 3.
Scatchard plots of [125I]–GM-CSF binding to target cells. In (A), N87 cells (1.3 × 106/200 μL/well) were incubated with 0.15, 0.3, 0.6, 1.2, 2.4, and 4.8 nmol/L [125I]–GM-CSF (5.7 μCi/μg) in RPMI containing 0.1% bovine serum albumin and 0.2% NaN3 for 30 minutes, washed, and counted. HL60 cells (B) were assayed similarly at 2.2 × 106/well.