ID 4.3.1.31 DE L-tryptophan ammonia lyase. CA L-tryptophan = (E)-3-(indol-3-yl)acrylate + NH4(+). CC -!- The enzyme, characterized from the bacterium Rubrivivax CC benzoatilyticus JA2, requires no cofactors. CC -!- It acts on L-phenylalanine and L-glutamate with about 60% of the CC activity with L-tryptophan, and on L-tyrosine, glycine, and L-alanine CC with about 30% of the activity. //