http://www.chem.qmul.ac.uk/iubmb/enzyme/rules.html http://www.chem.qmul.ac.uk/iubmb/enzyme/rules.html http://www.chem.qmul.ac.uk/iubmb/enzyme/rules.html http://www.chem.qmul.ac.uk/iubmb/enzyme/rules.html Enzyme Nomenclature http://www.chem.qmul.ac.uk/iubmb/enzyme/rules.html