glycylglycine significantly inhibited absorption of several amino acid residues ( aspartic acid + asparagine , serine , glutamic acid + glutamine , proline , alanine , phenylalanine , threonine and isoleucine ) from the free amino acid mixture , whereas it significantly inhibited the absorption of only two ( serine , glutamin acid + glutamine ) from the peptide-containing partial casein hydrolysate .
C0002520
amino acid
C0017797
glutamine