460 410 360 310 260 210 160 110 60 -10 -S10 5 10 15 20 25 30 35 40 45 50 55 1/IS] per mM 1. What type of inhibition is shown by the data in the graph? Indicate which line is not inhibited. 1/v min/uM
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- If the new higher KM value is 0.1 mM resulting in the new plot red curve is due to presence of enzyme inhibitor is the inhibitor reversible or irreversible?Using equilibrium argument, why does Km apparently increase, decrease or stay the same in uncompetitive inhibition?If the higher value of KM resulting in the new plot ( red curb ) is due to the presence of an enzyme inhibitor is inhibitor reversible or irreversible? And why?
- Why does a pure noncompetitive inhibitor not changethe observed KM?For the following aspartase reaction in the presence of the inhibitor hydroxymethylaspartate, determine Km and whether the inhibition is competitive or noncompetitive. You have to plot thegraph on the graph paper and also by using excel.[S] V, No Inhibitor V, Inhibitor Present(molarity) (arbitrary units) (same arbitrary units) 1 x 10-4 0.026 0.0105 x 10-4 0.092 0.0401.5 x 10-3 0.136 0.0862.5 x 10-3 0.150 0.1205 x 10-3 0.165 0.142The drug troglitazone was used to treat diabetes but was withdrawn from the market when patientswho took the drug suffered from severe side effects. The data below show the activity of an enzymein the steroid biosynthetic pathway in the presence and absence of 10 µM troglitazone.[S] (µM) v0 (pmol min-1)Create a plot of 1/v0 vs. 1/[S]. Calculate KM and vmax in presence and absence of inhibitor. Whattype of inhibitor is troglitazone? Clearly support your answer.
- The inhibitory effect of an uncompetitive inhibitor is greater at high [S] thanat low [S]. Explain this observation.The following data, presented by G. Bowes and W. L. Ogre in J. Biol. Chem. (1972) 247:2171–2176, describe the relative rates of incorporation of CO2 by Rubisco under N2 and under pure O2. Decide whether O2 is a competitive or uncompetitive inhibitor.Di-isopropyl fluorophosphate is a(n) .................. inhibitor of chymotrypsin ? a) allosteric b) irreversible c) uncompetitive d) competitive e) mixed
- What is the minimum inhibitory concentration indicated in the following image?draw and label a Michaelis-Menten plot showing the effect of a compentitive inhibitorWhat is the impact of the lower value Vmax on the affinity for enzyme for substrate? And what is impact of the lower V max on the amount of product formed ? If the lower value of black resulting in the new plot (red curve) is due to presence of enzyme inhibitor is the inhibitor reversible or irreversible ? And why?