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Three molecular ionic states, P-R are possible for the amino acid histidine. Identify the correct choice of pH values, respectively for the observation of the ionic states P-R.
Basics of Organic Reaction Mechanism mcq question image

Three molecular ionic states, P-R are possible for the amino acid histidine. Identify the correct choice of pH values, respectively for the observation of the ionic states P-R.
Basics of Organic Reaction Mechanism mcq question image Correct Answer P at pH 1; Q at pH 12; R at pH 7

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