For example, prolongation of the alkaline lysis step for {TAIL ~ 4 to 24 hours} together with the addition of {HEAD ~ lysozyme} has been employed to reduce the levels of RNase.  
For example , prolongation of the alkaline lysis step for { TAIL ~ 4 to 24 hours } together with the addition of { HEAD ~ lysozyme } has been employed to reduce the levels of RNase .
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH