Shown below is the amino acid tyrosine in its protonated state, with the pk of each ionizable proton indicated. pk = 10 HO H³N pk = 9 COOH pk = 2 Which best represents the predominant state of tyrosine at pH 7? a НО. H₂N COOH H₂N COO с НО. H₂N COO d HO. H₂N 1 COO

General, Organic, and Biological Chemistry
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Author:H. Stephen Stoker
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Chapter20: Proteins
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Problem 20.48EP: Most amino acids have isoelectric points between 5.0 and 6.0, but the isoelectric point of lysine is...
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Shown below is the amino acid tyrosine in its protonated state, with the pK₂of each ionizable proton indicated.
pK₂ = 10
HO
COOH
pk = 9
pK₂ = 2
Which best represents the predominant state of tyrosine at pH 7?
a HO.
O O
OO
a
b
U
H3N
P
H₂N COOH
b
H₂N COO
с
НО.
H₂N COO
d HO.
H₂N
COO
Transcribed Image Text:Shown below is the amino acid tyrosine in its protonated state, with the pK₂of each ionizable proton indicated. pK₂ = 10 HO COOH pk = 9 pK₂ = 2 Which best represents the predominant state of tyrosine at pH 7? a HO. O O OO a b U H3N P H₂N COOH b H₂N COO с НО. H₂N COO d HO. H₂N COO
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