5. Determine the live weight of each mouse prior to each injection and record. Mark each animal to distinguish it on subsequent days.
6. Calculate the volume of ENU for injection depending on the desired dose. For 100 mg ENU/kg mouse body weight, the calculation is as follows:
Formula
where 0.72 is OD398nm at 1 mg/mL and 5 is the dilution factor (see Steps 3-4).
Volume of ENU to inject (mL) = mouse weight (g) × X
The concentration of the ENU solution should be such that