266 The alpha subunit is responsible for the aldol cleavage of indoleglycerol phosphate to indole and glyceraldehyde 3- phosphate. Ava_2082 Tryptophan synthase alpha chain TRPA_ANAVT MTAISDRFETLKQNQECALIPFITAGDPDLETTAAALKILDSNGADIIELGIPYSDPLADGPVIQAAATRALQNGTKLESVLEMLKVTTPSLQAPIVLFTYYNSILHRGIDNFLEQVAAAGVAGLVVPDLPLEEAAGLLKPATERGIDLILLIAPTSSSERIEAIARSSQGFIYLVSVTGVTGMRSQVEGRVLDLLQKVRQVTDKPLGVGFGISQPAQATQVRDWGADAAIVGSAFVQRLATGTPAEGLSAIAEFCQSLKAAIKTS trpA