Other Amino Acids - in proteins Result from “post-translational” modifications examples: z Hydroxylysine, hydroxyproline - collagen z Carboxyglutamate - blood-clotting proteins z Pyroglutamate - bacteriorhodopsin z Phosphorylated amino acids - signaling device z D- alanine, D-glutamic acid: bacterial cell wall polypetides z γ-aminobutyric acid: neurotransmitter z Homoserine: intermediate in amino acid metabolism z Ornithine: intermediate in arginine synthesisOther Amino Acids - in proteins Result from “post-translational” modifications examples: z Hydroxylysine, hydroxyproline - collagen z Carboxyglutamate - blood-clotting proteins z Pyroglutamate - bacteriorhodopsin z Phosphorylated amino acids - signaling device z D- alanine, D-glutamic acid: bacterial cell wall polypetides z γ-aminobutyric acid: neurotransmitter z Homoserine: intermediate in amino acid metabolism z Ornithine: intermediate in arginine synthesis