this direct demonstration of the presence of coper in pseudomonad tryptophan oxygenase , using 64-cu , avoided the problems and artifacts inherent in the usual techniques of copper analysis and unequivocally refutes the recent contention of ishimura and hayaishi ( ( 1973 ) j. biol.chem . 248 , 8610-8612 ) `` '' that copper is not an essential component of l-tryptophan 2,3-dioxygenase of pseudomonas . '' ''
C0041256
tryptophan
C0599874
-dioxygenas