Illustration of the structure of the TnsC protein (green and grey), the transposition regulator of the Tn7 transposon from the bacterium Vibrio cholerae. Transposons are sequences of DNA (deoxyribonucleic acid, yellow) that can move, or transpose, themselves to new positions within the genome of a single cell. TnsC is an ATP-dependent DNA-binding protein that regulates the assembly of the transpososome, a complex of proteins that it is a component of, and within which transposition happens.