However , such differences are usually subtle ( particularly between allozymes which are often neutral variants ) .
Unless they are identical in terms of their biochemical properties , for example their substrates and enzyme kinetics , they may be distinguished by a biochemical assay .
Such differences are usually subtle ( particularly between allozymes which are often neutral variants ) .
Unless they are identical in terms of their biochemical properties , for example their substrates and enzyme kinetics , they may be distinguished by a biochemical assay .