Figure 1.

Competition binding assay. HT-29 colon tumor cells (2x10⁵ cells/well) were incubated at 4°C for 5 hours in the presence of 0.1 nM ¹²⁵I-labeled chimeric ING-1 and increasing concentrations of unlabeled ING-1 or chimeric ING-1. The cells were then washed and counted.