Dodecyltrimethylammonium-d 34 (bromide) is the deuterium labeled Dodecyltrimethylammonium (bromide). Dodecyltrimethylammonium bromide (DTAB) is a surfactant. Dodecyltrimethylammonium bromide interacts with DNA and changes the mechanical properties of DNA on binding and the specific binding parameters of the interaction.