Fig. 7.

SSB enhances the unwinding processivity of the full length helicase-protease NS3-4A. The 40bp forked substrate (Table I, 3) is unwound by the full length helicase-protease NS3-4A in the presence ( ) and absence ( ) of SSB at average rates of 0.22 bp/s and 0.4 bp/s, respectively.