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|Section2= |Section7= }} Aspartic acid (abbreviated as Asp or D)〔.〕 is an α-amino acid with the chemical formula HOOCCH(NH2)CH2COOH. Asp's L-isomer is one of the 23 proteinogenic amino acids, i.e., the building blocks of proteins. Its codons are GAU and GAC. Asp (and glutamic acid) is classified as acidic, with a pKa of 3.9, however in a peptide this is highly dependent on the local environment (as with all amino acids), and could be as high as 14. Asp is pervasive in biosynthesis. ==Discovery== Aspartic acid was first discovered in 1827 by Auguste-Arthur Plisson and Étienne Ossian Henry, derived from asparagine, which had been isolated from asparagus juice in 1806, by boiling with a base. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Aspartic acid」の詳細全文を読む スポンサード リンク
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