Question

does aromatic amino acids can form hydrogen bond

Answer 1

Yes, aromatic amino acids can form hydrogen bonds. Aromatic amino acids such as phenylalanine, tyrosine, and tryptophan have aromatic rings which contain delocalized π electrons. These π electrons can participate in hydrogen bonding by acting as both a hydrogen bond acceptor and a hydrogen bond donor. The hydrogen bond acceptor is the electron-rich π cloud of the aromatic ring, while the hydrogen bond donor is the hydrogen atom bonded to the nitrogen or oxygen atom of the amino acid side chain.