The PK₁,pK₂,and PK_R for the Amino Acid Lysine Are 2 $\alpha$

The pK₁,pK₂,and pK_R for the amino acid lysine are 2.2,9.1,and 10.5,respectively.At pH 1.0,lysine would be charged predominantly as follows:

A) " $\alpha$ -carboxylate 0, $\alpha$ -amino −1 $\varepsilon$ -amino −1,net charge −2"
B) " $\alpha$ -carboxylate −1, $\alpha$ -amino +1, $\varepsilon$ -amino +1,net charge +1"
C) " $\alpha$ -carboxylate +1, $\alpha$ -amino +2, $\varepsilon$ -amino +2,net charge +5"
D) " $\alpha$ -carboxylate 0, $\alpha$ -amino +1, $\varepsilon$ -amino +1,net charge +2"
E) " $\alpha$ -carboxylate +2, $\alpha$ -amino +1, $\varepsilon$ -amino +1,net charge +4"

Correct Answer:

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