Near a pH of 5.5,L-lysine (R = −(CH2) 4NH2) the major species in aqueous solution is the diprotonated zwitterion.Given the following acid dissociation constants,what is the correct structure of the zwitterion?
Functional Group
Ka
Carboxylic acid
1) 7 x10-2
Amine
8) 5 x10-10
Side chain amine
1) 51 x10-11
A)
B)
C)
D)
E)
Correct Answer:
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