Amino acids that are acidic in nature contain | vedclass

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(B) Amino acids are classified based on the nature of their '$R$' group. Acidic amino acids (e.g.,Aspartic acid,Glutamic acid) contain an extra carbox

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Polar,negatively charged '$R$' group

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(B) Amino acids are classified based on the nature of their '$R$' group. Acidic amino acids (e.g.,Aspartic acid,Glutamic acid) contain an extra carboxyl group $(-COOH)$ in their side chain. At physiological $pH$,this carboxyl group dissociates to form a carboxylate ion $(-COO^-)$,which imparts a negative charge to the '$R$' group. Therefore,acidic amino acids are characterized by having a polar,negatively charged '$R$' group.

Column-$I$ (Type of Amino Acid)	Column-$II$ (Example)
$(A)$ Polar and uncharged $R$ group	$(i)$ Methionine
$(B)$ Non-polar $R$ group	$(ii)$ Glutamic acid
$(C)$ Polar and negatively charged $R$ group	$(iii)$ Lysine
$(D)$ Polar and positively charged $R$ group	$(iv)$ Cysteine

Amino acids that are acidic in nature contain which of the following?

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