And the second question is, if that protein is present and we can measure the enzyme activity, what is the concentration of that protein? What is the amount of protein found inside that sample? So once we know the enzyme activity and the concentration of that protein that are sampled, we can then calculate the specific activity. And during our purification process, when we're isolating that specific protein we can use the specific activity value to basically determine how pure our sample actually is. So we conduct our protein acid and we know that the protein is found inside our sample. And then we begin carrying out the purification processes.