Now, the final regulation method is basically something called an isoenzyme or isozyme. So what exactly is an isoenzyme? Well, an isoenzyme or isoenzymes, to be more correct, are these enzymes that differ in their sequence of amino acids and so they differ in the structure. They are three dimensional structure but they are actually used to carry out the same type of reaction. So ISO enzymes are basically multiple forms of the same type of enzyme that carries out the same type of function. So ISO enzymes are enzymes that differ in their amino acid sequence and three dimensional structure, but which catalyze the same type of reaction inside our body.