Nonionic detergents such as NP-40 or triton fail to solubilize many cellular proteins involved in cell signaling. This problem is particularly acute in brain where synaptic junctions are known to be insoluble in nonionic detergents. 1% SDS completely solubilizes membrane and other hard to solubilize proteins including synaptic junction proteins. Suitable for both organs and tissue culture cells.
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