In the following schematic graph, the fraction of promoters (px) bound to the regulatory protein A is plotted at various concentrations of A. Which of the following quantities represents X in the graph?
A) [Total pₓ]
B) [pₓ]
C)kₒn / kₒff
D) kₒff / kₒn
E)kon[px] / koff

Question

In the following schematic graph, the fraction of promoters (px) bound to the regulatory protein A is plotted at various concentrations of A. Which of the following quantities represents X in the graph? 
A) [Total pₓ] 
B) [pₓ] 
C)kₒn / kₒff 
D) kₒff / kₒn 
E)kon[px] / koff

Quizplus · Accepted Answer

The bound fraction reaches its half-maximum value when [A] = kₒff/ kₒn = Kd. Please refer to the equations in Figure 8-72.

In the Following Schematic Graph, the Fraction of Promoters (Px)