nicking response catalysed from the MobA89K and MobC89K proteins. The cleaved strand is then unwound by the helicase and shipped to the 89K-encoded GI-style T4SS equipment. The VirB1-89K component is thought to act as a lytic transglycosylase, regionally opening the peptidoglycan with contributions from some other factor(s) over the assembly from t