Hi,

I'have treated cell cultures with H2O2 (SIGMA cat# H1009) and the first time I obtained good results, but now it doesn't work anymore,,,, I'm wondering if there is something wrong in that kind of H2O2 or in my way of storage (aliquots at 4°C and dilution in water just before adding to the cells). 

Can you help me?

Thanks in advance,

Roberta

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