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Biochem lecture 32
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Transport of ammonia to the liver is mostly in the form of _____ or ______.
Glutamine or alanine
_____ ______ is responsible for te synthesis of glutamine from glutamate and NH3
Glutamine synthetase.
glutamate is synthesized by the _____ amination of __________ catalyzed by glutamate dehydrogenase.
reductive, a-ketoglutarate
Glutamate arises from __________ reactions with the amino nitrogen being donated by a number of different _____ _____.
aminotransferase
amino acids
Glutamine is produced from glutamate by the direct incorporation of _______; which can be considered a ____ _____ reaction.
Ammonia
nitrogen fixing
Role of glutamine is to carry ammonia from ______ _____ to the ____ where it is converted to ammonia by ________.
Peripheral tissues to the liver
glutaminase
Second mechanism of ammonia transport is by
alanine
pyruvate is transaminated to form _____
alanine
Synthesis of urea requires 5 enzymes
Carbamoyl phosphate synthetase I
orithinine transcarbomoylase
argininosuccinate synthetase
agrininosuccinate lyase
arginase
Carbomoyl phosphate is the ______ and is inside the ______.
Rate limiting step
mitochondria
arginine is an allosteric _____
activator
There are _#_ ATPs used in the urea cycle.
4
OTC is for the formation of
Citrulline
Oxaloacetate fates
Transamination to aspartate
Conversion into glucose by gluconeogenic path
condensation with acetly-CoA to form citrate
Conversion to pyruvate
Amino group of amino acids are transferred to ________, forming an alpha-keto acid and glutamate via ______.
a-ketoglutarate
transaminase.
Glutamate is deaminated to form _______ and to regenerate _____ via glutamine dehydrogenase.
Ammonia and to regenerate a-ketoglutarate
Conversion and elimination of ammonia as _____ via ______ _____ _________ and the urea cycle enzymes.
Urea
Carbomyl Phosphate synthetase
Metabolism of the carbon backbone occurs via the
TCA cycle
Author
swynocker
ID
47801
Card Set
Biochem lecture 32
Description
Biochem 32 ex3
Updated
2010-11-07T02:32:38Z
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