Figure 2.

AFM measurements of step propagation rate vs concentration along both obtuse and acute directions for solutions containing (a) fetuin, (b) OPN, and (c) OC90. Normalized step speeds are given to emphasize the relative enhancement and/or inhibition and minimize the effects of inherent run-to-run variations in the step speed values. Lines are guides to the eye. Solid lines: σ = 0.9; dashed lines in (a): σ = 2.3. Error bars represent 10% of the measured value and are based upon error analyses in our previous investigations.^26a,34