In addition, two short segments of {TAIL ~ the instant nucleic acid fragments} may be used in polymerase chain reaction protocols to amplify longer nucleic acid fragments encoding {HEAD ~ homologous genes} from DNA or RNA 
In addition , two short segments of { TAIL ~ the instant nucleic acid fragments } may be used in polymerase chain reaction protocols to amplify longer nucleic acid fragments encoding { HEAD ~ homologous genes } from DNA or RNA
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH