Which amino acid is acidic?
Ans. (a) Aspartic acidBased in variable side chain, amino acid can be classified into: Aliphatic amino acid and Aromatic amino acid.Aliphatic amino acidAromatic amino acidIt is further classified into several subtypes:* Simple AA: Glycine, Alanine* Branched chain AA: Leucine, Isoleucine, Valine* Sulphur containing: Cysteine, Methionine* With-OH group: Serine, Threonine* With amide group: Asparagine, Glutamine* Acidic AA: Aspartic acid, Glutamic acid* Basic AA: Arginine, Lysine* Histidine* Tyrosine* Tryptophan* Phenylalanine* Basic amino acid: Histidine, Arginine, Lysine (Histidine is also basic in nature, but it is aromatic)* -OH containing AA: Threonine, Serine, Tyrosine* Most basic amino acid: Arginine
Aspartic acid
Valine
Leucine
Aspartate
Proteins and Amino Acids