Dear Vahid,

Please see the following:

L-Asparagine powder (cat. no.

A4159); prepare a 8.3 mg/ml stock

solution in H2

O. Store at -20°C

until use.

Source: http://www.biotechniques.com/multimedia/archive/00229/BTN5502-BM-Mathupal_229565a.pdf (see attached file).

Hoping this will be helpful,

Rafik

Dear Rafik,

Thank you for your help. I did it but When I thaw the solution, a precipitate is formed in solution and I have to warm the solution to resolve it

Dear Vahid,

You did the right thing.

Rafik