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[henzy]

Does anyone know if the NP-40 that comes with the NEB PNGase F kit is actually nonidet p-40 or the tergitol-type NP-40???
Is it pretty safe to assume in molecular biology that nearly any protocol that mentions "NP-40" is really referring to nonidet p-40 (now ipegal)?

This is driving me nuts!

Thanks.

[miBunny]

Can you get the MSDS for the kit?  If so, then you may be able to see the CAS number for the NP-40.  You can then match the CAS number to tergitol NP-40 or nonidet NP-40 and see which one it matches