Molybdenum is an essential trace mineral that plays intimate roles in the global cycles of nitrate, carbon, and sulfur. It takes two forms when participated in the element metabolism, one is as inorganic salt and composed with nutrition, the other is as the cofacter of molybdeumenzy and takes part in many biochemistry reaction. Since last century 50 s the research shows that there is another kind of enzyme containing molybdenum except for nitrogen enzyme, which include xanthenes oxidase, nitrate reductase ,...