What is "hydroxyproline"

hydroxyproline \hydroxyproline\ n. 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.

n. (context biochemistry English) A hydroxy derivative of the amino acid ''proline'' found in the structural proteins of connective tissue

n. a crystalline amino acid obtained from gelatin or collagen

(2S,4R)-4-Hydroxyproline, or L-hydroxyproline ( C H O N), is a common non-proteinogenic amino acid, abbreviated as Hyp, e.g., in Protein Data Bank.