You are investigating the biochemical origins of cow methane emissions (belches and farts, to be blunt) which contribute to global warming.
Bacteria in the cow gut make methane and a key enzyme in the pathway is methyl-coenzyme M reductase. The turnover number of pure enzyme (mass 300 kDa) is 100 s-1. What is the specific activity of the enzyme in µmol.min-1.mg-1?
A cow typically 'emits' 100 L of methane gas a day. Given the concentration of methane in this gas is 0.05 M, how many mg of this enzyme does the cow gut contain?