amino acid metabolic pathway hydrophobic amino acid metabolic pathway 2012-07-31T10:30:19Z PW:0001074 Those metabolic reactions involving hydrophobic, uncharged amino acids. Hydrophobic amino acids include alanine, valine, isoleucine, leucine and methionine with hydrocarbon side chains and the phenylalanine, tyrosine and tryptophan with bulky, aromatic side chains. pathway vpetri