CYP2E1 has a much higher Km for ethanol than ADH (11 mM versus 0.05 mM, respectively). When greater portions of ethanol are ingested (0.08% or 17 mM), which part of the statement would be true?
CYP2E1 has a much higher Km for ethanol than ADH (11 mM versus 0.05 mM, respectively). When greater portions of ethanol are ingested (0.08% or 17 mM), which part of the statement would be true?
Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
Problem 1P
Related questions
Question
CYP2E1 has a much higher Km for ethanol than ADH (11 mM versus 0.05 mM,
respectively). When greater portions of ethanol are ingested (0.08% or 17 mM), which part of the statement would be true?
![Cytosol
Mitochondrion
A. PATHWAY 1.
major
pathway of
ethanol
NAD* NADH + H*
NAD* NADH + H*
H
metabolism
in the liver сн, -сн, он— АDH сн, сно
сн, с-он + н-о-н
ALDH
ETHANOL
ACETALDEHYDE
АСЕТАTE
WATER
B. PATHWAY 2
microsomal
ethanol
CYP2E1
oxidizing
system
(МEOS)
NADPH + H* + O2
NADP* + 2H,O
Excess alcohol consumption increases the NADH:NAD* ratio in the cytosol of hepatocytes.
The main location of ethanol metabolism in the body is the liver and the main route of
detoxification includes liver alcohol dehydrogenases (ADH) located in the cytosol and aldehyde
dehydrogenases (ALDH) located in the mitochondrion. Together these sequentially convert
ethanol into acetate. A second (more minor) route of detoxification includes the microsomal
ethanol oxidizing system (MEOS).](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F3965fd82-e492-4f44-aa84-e20c6b6235ca%2F0a078913-5a67-44ac-90a9-660abb180c4f%2Feill99p_processed.png&w=3840&q=75)
Transcribed Image Text:Cytosol
Mitochondrion
A. PATHWAY 1.
major
pathway of
ethanol
NAD* NADH + H*
NAD* NADH + H*
H
metabolism
in the liver сн, -сн, он— АDH сн, сно
сн, с-он + н-о-н
ALDH
ETHANOL
ACETALDEHYDE
АСЕТАTE
WATER
B. PATHWAY 2
microsomal
ethanol
CYP2E1
oxidizing
system
(МEOS)
NADPH + H* + O2
NADP* + 2H,O
Excess alcohol consumption increases the NADH:NAD* ratio in the cytosol of hepatocytes.
The main location of ethanol metabolism in the body is the liver and the main route of
detoxification includes liver alcohol dehydrogenases (ADH) located in the cytosol and aldehyde
dehydrogenases (ALDH) located in the mitochondrion. Together these sequentially convert
ethanol into acetate. A second (more minor) route of detoxification includes the microsomal
ethanol oxidizing system (MEOS).
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