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