i use 5ug/ml for the final stimulation. 0 l$ s" a8 j. {; T0 O) \6 c0 |; P- Xstock is 5mg/ul in water and then passing though 22um membrane.7 v5 O" J' C- X
keep the stock solution at 4 degree, and i think 3 month should be no problem. $ g# H9 d' {' q2 m* t% a$ Q' lkeep the powder also at 4 degree.