<p>MutL and MutS are key components of the DNA repair machinery that corrects replication errors [<cite idref="PUB00035423"/>]. MutS recognises mispaired or unpaired bases in a DNA duplex and in the presence of ATP, recruits MutL to form a DNA signalling complex for repair. The N-terminal region of MutL contains the ATPase domain and the C-terminal is involved in dimerisation [<cite idref="PUB00032360"/>]. </p>