About 4,000 reactions are known to be catalysed by enzymes. Source: Internet
;Acidity regulators : Acidity regulators are used to control the pH of foods for stability or to affect activity of enzymes. Source: Internet
A family of selenium-dependent enzymes called deiodinases converts T4 to T3 (the active hormone) by removing an iodine atom from the outer tyrosine ring. Source: Internet
A family of non-selenium-dependent enzymes then further deiodinates the products of these reactions. Source: Internet
After release dopamine can either be taken up again by the presynaptic terminal, or broken down by enzymes. Source: Internet
After the production of pregnenolone, specific enzymes of each cortical layer further modify it. Source: Internet