Question: a. Explain why, when the imidazole ring of histidine is protonated, the double-bonded nitrogen is the nitrogen that accepts the proton. b. Explain why, when

a. Explain why, when the imidazole ring of histidine is protonated, the double-bonded nitrogen is the nitrogen that accepts the proton.
A. Explain why, when the imidazole ring of histidine is

b. Explain why, when the guanidino group of arginine is protonated, the double-bonded nitrogen is the nitrogen that accepts the proton.

A. Explain why, when the imidazole ring of histidine is

CH CHCOO NH3 CH CHCOO NH2 :N NH NH H,NCNHCH CH CH CHCO NH3 NH-

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