My Harper's Writes:
Harper's illustrated Biochemistry, 29th ed. wrote:Each functional group of an amino acid exhibits all of its characteristic chemical reactions. For carboxylic acid groups, these reactions include the formation of esters, amides, and acidanhydrides; for amino groups, acylation, amidation, and esterification; and for —OH and —SH groups, oxidation, and esterification. The most important reaction of amino acids is the
formation of a peptide bond (shaded).
Regarding the classic "Fischer Esterification", the process requires either a molecule containing —OH (Typically an alcohol) and a —CO2H. (Carboxilic Acid)
Why Harper claims esterification can be related to Amino part, while it(—NH2) has neither —OH nor —CO2H?
Thanks
Hendrick Laursen