In such a reagent, {HEAD ~ the liberated nucleic acids} are protected from {TAIL ~ nuclease degradation} by the ionic detergent 
are protected from
In such a reagent , { HEAD ~ the liberated nucleic acids } are protected from { TAIL ~ nuclease degradation } by the ionic detergent
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH