All enzymes are proteins.
The conversion of threonine to isoleucine is regulated by feed-back inhibition. Write down the types of enzymes which are involved in phosphorylation and dephosphorylation process, a regulatory mechanism of enzyme activities. Define zymogens with two examples. Name the types of interactions involved in ES complex formation. List two differences between the enzymes which obey Michaelis-Menton equation and the allosterically regulated enzymes.