When the imidazole ring of Histidine is protonated, tendency of nitrogen to be protonated (proton migrates from – COOH) is in the order
Correct option (c)
Explanation:
γ(–NH2) is close to –COOH, in β(–NH–), the lone pair of electrons is involved in resonance, and the lone pair on α(–N =) is intact on N-atom.
