It is demonstrated that {HEAD ~ such proteins} bind ATP and {TAIL ~ nucleic acid} and possess helicase and ATPase activities 
bind
It is demonstrated that { HEAD ~ such proteins } bind ATP and { TAIL ~ nucleic acid } and possess helicase and ATPase activities
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH