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Which of the nitrogenof histidine is fir...

Which of the nitrogenof histidine is first protonated ?

A

`alpha`

B

`beta`

C

Both

D

None

Text Solution

Verified by Experts

The correct Answer is:
B
Protonation at `beta-N` leads to imidazolium ion, which is stablized by two equivalent resonating structures.
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