Data are plotted for the action of a histone-modifying enzyme (solid lines) in two graph formats in Figure 4.10.Dashed lines indicate the data for the enzyme in the presence of an effector molecule, deoxycytidine triphosphate (dCTP). Which statement is not true regarding this enzyme, its substrate (histone protein), and its effector dCTP?

Question

Data are plotted for the action of a histone-modifying enzyme (solid lines) in two graph formats in Figure 4.10.Dashed lines indicate the data for the enzyme in the presence of an effector molecule, deoxycytidine triphosphate (dCTP).  Which statement is not true regarding this enzyme, its substrate (histone protein), and its effector dCTP?

Quizplus · Accepted Answer

This is an allosteric enzyme that does not obey Michaelis-Menten kinetics.dCTP is a negative allosteric effector that reduces the affinity between enzyme and substrate.

Data Are Plotted for the Action of a Histone-Modifying Enzyme