From {HEAD ~ about 2 8 units} of at least one nucleic acid polymerase, preferably Taq DNA polymerase, is then added to the reaction mixture and the mixture is treated according to the normal procedure for {TAIL ~ the polymerase chain reaction} 
From { HEAD ~ about 2 8 units } of at least one nucleic acid polymerase , preferably Taq DNA polymerase , is then added to the reaction mixture and the mixture is treated according to the normal procedure for { TAIL ~ the polymerase chain reaction }
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL