Solved: The amino acid cysteine, C3H7NO2S, is biosynthesized from a substance called
Chapter 29, Problem 29.56(choose chapter or problem)
The amino acid cysteine, C3H7NO2S, is biosynthesized from a substance called cystathionine by a multistep pathway. Cystathionine OCCHCH2CH2SCH2CHCO NH4 + + + ? Cysteine +NH3 O +NH3 O (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 the equation?
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