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What charged groups are present in lysine at a pH = 7?

What charged groups are present in lysine at a pH = 7?

Biochemistry
Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
Problem 1P
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What charged groups are present in lysine at a pH = 7? O A) 1 × NH3¹ B) 1 x COO OC) 1× NH3+ and 1 x COO- Jay OD) 2 × NH3 and 1 × COO- + OE) 1 × NH3+ and 2 × COO- O F) None
Transcribed Image Text:What charged groups are present in lysine at a pH = 7? O A) 1 × NH3¹ B) 1 x COO OC) 1× NH3+ and 1 x COO- Jay OD) 2 × NH3 and 1 × COO- + OE) 1 × NH3+ and 2 × COO- O F) None
Expert Solution
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Amino acids are building blocks of proteins. The alpha carbon of amino acids consist of amine group, carboxyl group and side chain group. Based on the side chain group, amino acids can be polar, uncharged polar and non-polar.

Lysine is positively charged polar amino acids with side chain group of -(CH2)4-NH3+. Lys is a positively charged basic amino acid.

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