Finally, the invention provides a method of separating {HEAD ~ a selected nucleic acid} from {TAIL ~ other nucleic acids} 
from
Finally , the invention provides a method of separating { HEAD ~ a selected nucleic acid } from { TAIL ~ other nucleic acids }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL