Well, the value tells us the moles of product produced over some time period per amount of enzyme found inside that particular sample. Now what this can be used for is when we actually know. So following the assay, when we know that inside our sample we have our protein, we can then begin the purification process. And during the purification process we can continually calculate the specific activity value. And if the specific activity value is increasing then what that means is our sample is getting pure and pure. And eventually if we have a sample in which we only have that enzyme, the lactate dehydrogenase, at this particular point we're going to reach a maximum value for that specific activity and this will no longer increase.