Springer, Dordrecht, pp 213 229
discount cialis tyrosine, methyltyrosine and o chloro p chloro 3, 4 dichloro, o m or p methyl 2, 4, 6 trimethyl 2 ethoxy 5 nitro, 2 hydroxy 5 nitro and p nitro phenylalanine; furyl thienyl pyridyl pyrimidinyl purine or naphthylalanines; and tryptophan analogues and derivatives including kynurenine, 3 hydroxykynurenine, 2 hydroxytryptophan and 4 carboxytryptophan residues; О± amino substituted amino acid residues including sarcosine N methylglycine, N benzylglycine, N methylalanine, N benzylalanine, N methylphenylalanine, N benzylphenylalanine, N methylvaline and N benzylvaline; and О± Hydroxy and substituted О± hydroxy amino acid residues including serine, threonine, allothreonine, phosphoserine and phosphothreonine residues