Hydroxyproline vs. Proline

Hydroxyprolinenoun

(biochemistry) A hydroxy derivative of the amino acid proline found in the structural proteins of connective tissue

Hydroxyprolinenoun

A crystalline amino acid (C5H9NO3), a hydroxylated proline, obtained by hydrolysis of gelatin or collagen. Chemically it is 4-hydroxy-L-proline. It is classified as nonessential for growth in rats.

Hydroxyprolinenoun

a crystalline amino acid obtained from gelatin or collagen

Hydroxyproline

(2S,4R)-4-Hydroxyproline, or L-hydroxyproline (C5H9O3N), is an amino acid, abbreviated as Hyp or O, e.g., in Protein Data Bank.

Prolinenoun

(amino acid) A nonessential amino acid C5H9NO2 found in most animal proteins, especially collagen; its cyclic structure leads to kinks in the peptide chain of proteins.

Prolinenoun

an amino acid that is found in many proteins (especially collagen)

Proline

Proline (symbol Pro or P) is an organic acid classed as a proteinogenic amino acid (used in the biosynthesis of proteins), although it does not contain the amino group -NH2 but is rather a secondary amine. The secondary amine nitrogen is in the protonated NH2+ form under biological conditions, while the carboxy group is in the deprotonated −COO− form.