You must convert a change in absorbance to a concentration of amylase reaction product using a standard curve of product concentration v. absorbance. The initial rate of increase of product concentration (µmoles/minute), divided by the amount of protein (mg) in the reaction, is the specific activity.
You must convert a change in absorbance to a concentration of amylase reaction product using a standard curve of product concentration v. absorbance. The initial rate of increase of product concentration (µmoles/minute), divided by the amount of protein (mg) in the reaction, is the specific activity.
incubate the reaction mixture for such time intervals and take the readings. Thats it. And as said by Adam sir convert the absorbance with respect to standard curve. Important thing here is to have activity calculated in µmoles of product formed "per minute" for all the time intervals.
It is crucial that you measure the initial rate of reaction, before the substrate becomes deplete and the reaction slows down. If you make a graph of product formed (y-axis) versus time (x-axis), you can calculate the reaction rate as the slope of the line from the origin through the earliest data points before the graph starts to curve downwards.