Chapter 22, Problem 50E

Interpretation Introduction

Interpretation: The structure of the following amino acids in its dipolar ion form:

(a) Val

(b)Phe

(c) Tyr

(d)Cys

Concept Introduction:

Although we usually write the structures of amino acids as neutral, their actual structure is ionic and depends on the pH. In general, amino acids undergo an intramolecular acid–base reaction to form a dipolar ion or a zwitterion.