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Biology LibreTexts

5B: Mathematical Analyses of Binding Graphs

  • Page ID
  • Learning Objectives

    • derive equations from the equation for fractional saturation Y = ([ML]/[M0] = [L]/(KD+ [L]) equations for 1/Y as a function of 1/[L] (double reciprocal plot), Y/[L] vs Y (bound/free vs bound or the Scatchard Plot) and draw a plot of Y vs log [L] (semilog plot)
    • draw error bars on the plots of Y vs L, 1/Y vs I/L, Y/L vs Y and Y vs log L.
    • explain from these derivative equations and graphs how to calculate determine Kd
    • describe appropriate methods to fit the data from these equations with special attention given to the effect of error bars in the experimental value of Y