Abstract
Fluoride inhibition of partially purified hydrazidase was studied. The mode of in-hibition was reversible and competitive with the substrate. Phosphate was not essential for the inhibition. The inhibition reached to its definite level fairly rapidly. The enzyme activity was not recovered from the inhibition by the addition of metal ions, includ ing Mg2+ and Fe2+. The degree of the inhibition was smaller than other cases when benzoyl hydrazide was the substrate.
