NP-40 is a commercially available detergent. The full name
of NP-40 is Tergitol-type NP-40, which is nonyl
Care should be taken to avoid confusing NP-40 with Nonidet
P-40 (octyl phenoxypolyethoxylethanol).
This detergent is not powerful enough to break the nuclear
membrane, but can break the cytoplasmic membrane. As such, it can
be used to obtain the cytoplasmic contents of a cellular