Fig. 3.

Rate constants for association between KIX and partner peptides (closed circles) correlate with peptide charge under our standard experimental conditions (R = −0.77, P = 0.04, n = 6). Squares represent rates extrapolated to infinite ionic strength, where long-range electrostatic effects are excluded. Squares with crosses represent association with KIX alone, and squares with diamonds represent association with KIX already bound to another partner. Data for FITC-cMyb obtained from ref. 22.