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The amino acid cysteine, C3H7NO2S, is biosynthesized from a substance called cystathionine by a multistep pathway. (a) The first step is a transamination. What is the product? (b) The second step is...

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The amino acid cysteine, C3H7NO2S, is biosynthesized from a substance called cystathionine by a multistep pathway.
(a) The first step is a transamination. What is the product?
(b) The second step is an E1cB reaction. Show the products and the mechanism of the reaction.
(c) The final step is a double-bond reduction. What organic cofactor is required for this reaction and what is the product represented by the question mark In theequation?

Answered Same Day Dec 24, 2021

Solution

David answered on Dec 24 2021
104 Votes
ANSWER :-
(a) The first step is transamination in which an amino group is transfe
ed from an amino acid to a keto
acid to form a new amino acid and keto acid. In the transamination pyridoxal phosphate is converted to
pyridoxamine phosphate.
N CH3
OH
P
O O
O
-
O
-
O
pyridoxal...
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