And these different forms of the same type of enzyme are known as isozymes or ISO enzymes. So isozymes generally allow our body to regulate the same type of biochemical reaction that takes place at different locations and sometimes at different times. Now, before we actually look at a specific example of ISO enzymes, let's generalize what we know about isozymes or ISO enzymes. So once again, isozymes are these different forms of the same type of enzyme and these isozymes come from different genes. And what that means is they're going to have different amino acid sequences and different threedimensional structures, but they will catalyze the same type of biochemical reaction. So we see that ISMES arise from different genes, they have different sequences of amino acids and what that means is they will generally have different biochemical properties.