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