Explain the The system of the nomenclature

The system of the nomenclature and the classification of enzymes is based exclusively on the reaction that is catalyzed and does not consider their origin or multiplicity. Enzymes catalyzing the same reaction, but isolated from different species, will have varying amino acid sequences so that they may be distinguished by electrophoretic methods. They may have different sizes and net negative charges and they may even differ in their catalytic behaviour