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The Molecular Structure of a Sample of Solid, Non-Ionized L-Phosphotyrosine

Question 124

Multiple Choice

The molecular structure of a sample of solid, non-ionized L-phosphotyrosine is shown below. The molecular structure of a sample of solid, non-ionized L-phosphotyrosine is shown below. What is the net charge of L-phosphotyrosine when placed in an aqueous solution at physiological pH 7.4?  (Note: Assume that the pK<sub>a</sub> values of the phosphoryl group are 2.2 and 7.2.) A) 0 B) −1 C) −2 D) −3 What is the net charge of L-phosphotyrosine when placed in an aqueous solution at physiological pH 7.4?  (Note: Assume that the pKa values of the phosphoryl group are 2.2 and 7.2.)


A) 0
B) −1
C) −2
D) −3

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