Written by Grant England AP225, Fall 2011
CTAB, or cetyl trimethylammonium bromide is a common cationic surfactant . It is commonly used in protein electrophoresis due to its positive charge which allows it to solubulize negatively charged glycoproteins. It is also one of the main components of cetrimide, a powerful antiseptic detergent which is also used in cetrimide agar--a selective growth medium.
CTAB, like any surfactant, can also be used as an emulstion stabilizer.