A research group discovers a new version of the rainbowase enzyme, which they call rainbowase*, that catalyzes the chemical reaction: RAIN rainbows The researchers began to characterize the enzyme. a) In the 1st experiment, with [E] at 4 nM, they find that the Vmax is 1.6 µM s-1. Based on this experiment, what is the kcat for rainbowase*? (include units and show work).
A research group discovers a new version of the rainbowase enzyme, which they call rainbowase*, that catalyzes the chemical reaction: RAIN rainbows The researchers began to characterize the enzyme. a) In the 1st experiment, with [E] at 4 nM, they find that the Vmax is 1.6 µM s-1. Based on this experiment, what is the kcat for rainbowase*? (include units and show work).
Chemistry for Engineering Students
3rd Edition
ISBN:9781285199023
Author:Lawrence S. Brown, Tom Holme
Publisher:Lawrence S. Brown, Tom Holme
Chapter11: Chemical Kinetics
Section: Chapter Questions
Problem 11.61PAE
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Question
![A research group discovers a new version of the rainbowase enzyme, which they
call rainbowase*, that catalyzes the chemical reaction:
RAIN
rainbows
The researchers began to characterize the enzyme.
a) In the 1st experiment, with [E] at 4 nM, they find that the Vmax is 1.6 uM s-1. Based on this
experiment, what is the kcat for rainbowase*? (include units and show work).
b) In another experiment, the [E] at 1 nM and [RAIN] at 30 µM, the researchers find that V.
= 300 nM s-1. What is the measure KM for rainbowase* for its substrate RAIN? (include
units and show work).](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F78fbc2f9-5ce5-4aa9-99e1-1139be15f6b7%2F2f7126b3-7af4-46f1-9f16-58dc3f244390%2Fh0yxzw2_processed.png&w=3840&q=75)
Transcribed Image Text:A research group discovers a new version of the rainbowase enzyme, which they
call rainbowase*, that catalyzes the chemical reaction:
RAIN
rainbows
The researchers began to characterize the enzyme.
a) In the 1st experiment, with [E] at 4 nM, they find that the Vmax is 1.6 uM s-1. Based on this
experiment, what is the kcat for rainbowase*? (include units and show work).
b) In another experiment, the [E] at 1 nM and [RAIN] at 30 µM, the researchers find that V.
= 300 nM s-1. What is the measure KM for rainbowase* for its substrate RAIN? (include
units and show work).
![c) Further research shows that the purified rainbowase* used in the first two experiments
was actually contaminated with a reversible inhibitor called "NO RAIN, NO rainbows".
When “NO RAIN, NO rainbows" is carefully removed from the rainbowase* preparation,
and the two experiments are repeated, the measured Vmax in (a) is increased to
4.8 µM -1, and the measured KM is (b) is now 15 µM. For the inhibitor "NO RAIN, NO
rainbows", calculate the values of a and a'.
d) Based on the information given above, what type of inhibitor is "NO RAIN, NO rainbows"?
(competitive, uncompetitive, mixed inhibitor, or other)?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F78fbc2f9-5ce5-4aa9-99e1-1139be15f6b7%2F2f7126b3-7af4-46f1-9f16-58dc3f244390%2F4cequbr_processed.png&w=3840&q=75)
Transcribed Image Text:c) Further research shows that the purified rainbowase* used in the first two experiments
was actually contaminated with a reversible inhibitor called "NO RAIN, NO rainbows".
When “NO RAIN, NO rainbows" is carefully removed from the rainbowase* preparation,
and the two experiments are repeated, the measured Vmax in (a) is increased to
4.8 µM -1, and the measured KM is (b) is now 15 µM. For the inhibitor "NO RAIN, NO
rainbows", calculate the values of a and a'.
d) Based on the information given above, what type of inhibitor is "NO RAIN, NO rainbows"?
(competitive, uncompetitive, mixed inhibitor, or other)?
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