Alternately, residual RNA and chromosomal DNA can be reduced by {TAIL ~ ammonium sulfate precipitation} following alkaline lysis, {HEAD ~ precipitation}, and clarification.  
Alternately , residual RNA and chromosomal DNA can be reduced by { TAIL ~ ammonium sulfate precipitation } following alkaline lysis , { HEAD ~ precipitation } , and clarification .
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH