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