they share the common features of a pathway which is subject to tryptophan repression , contains no unexpected complexes among the five enzymes , exhibits dissociable anthranilate synthase enzymes which do not require phosphoribosyl transferase for amidetransfer activity , contains separate indoleglycerol phosphate synthase and phosphoribosylanthranilate isomerase enzymes , and contains similar tryptophan synthetase multimers .
C0026741
complexes
C0003169
anthranilate synthase