At least 50 molybdenum enzymes are now known in bacteria, plants, and animals, although only bacterial and cyanobacterial enzymes are involved in nitrogen fixation.
Dịkarịa 50 molybdenum enzymes na-a maara ugbu a na bacteria, osisi, na ụmụ anụmanụ, ọ bụ ezie na na nje na cyanobacterial enzymes na-abuana ke nitrogen fixation.