Chemistry, 09.12.2019 19:31 acavalieri72
The imidazole side chain of histidine can function as either a general acid catalyst or a general base catalyst because
i. the imidazole group has a pka in the physiological ph range.
ii. in the physiological ph range, the sulfur in the ring can be easily protonated/deprotonated. (verified with instructor that sulfur was intended, not nitrogen)
iii. one guanidino group is protonated, and the other is deprotonated at physiological ph.
iv. the imidazole group is a strong reducing agent at physiological ph
a. i, ii
b. ii, iv
c. iv
d. i
e. ii, iii
Answers: 2
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The imidazole side chain of histidine can function as either a general acid catalyst or a general ba...
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