Select the correct representation of this aminoacid in aqueous solution at the stated pH values. pk, (a-CO₂H) = 2.20 pK, (a-NH₂) = 9.11 pK, (side chain OH) = 10.07 pl = 5.63 on NH₂ A HO HO at pH 1 HO at pH 9.59 E at pH 13 OH one or OH NH₂ NH3 NH₂ at pH 5.63 (the isoelectric point) HO НО OH and on an NH₂ NH₂ NH₂ B D F [Choose ] [Choose ] [Choose ] [Choose ] QO orl NH₂ NH₂ O OH H

Introduction to General, Organic and Biochemistry
11th Edition
ISBN:9781285869759
Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Publisher:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Chapter22: Proteins
Section: Chapter Questions
Problem 22.61P: 22-61 Polyglutamic acid (a polypeptide chain made only of glutamic acid residues) has an a-helix...
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Select the correct representation of this aminoacid in aqueous solution at the stated pH values.
pKa (a-CO₂H) = 2.20
pK₂ (α-NH₂) = 9.11
pKa (side chain OH) = 10.07
pl = 5.63
HO
Lont out on on
OH
OH
NH₂
NH₂
NH₁
HO
NH₂
B
D
at pH 1
HO
NH₂
of of an
OH
NH₂
NH₂
NH3
O
E
F
G
at pH 9.59
at pH 13.
at pH 5.63 (the isoelectric point)
HO
OH
HO
[Choose ]
[Choose ]
[Choose ]
[Choose ]
an
NH3
H
OH
Transcribed Image Text:Select the correct representation of this aminoacid in aqueous solution at the stated pH values. pKa (a-CO₂H) = 2.20 pK₂ (α-NH₂) = 9.11 pKa (side chain OH) = 10.07 pl = 5.63 HO Lont out on on OH OH NH₂ NH₂ NH₁ HO NH₂ B D at pH 1 HO NH₂ of of an OH NH₂ NH₂ NH3 O E F G at pH 9.59 at pH 13. at pH 5.63 (the isoelectric point) HO OH HO [Choose ] [Choose ] [Choose ] [Choose ] an NH3 H OH
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