Preferably, the polymer has a molecular weight in {HEAD ~ the range} of {TAIL ~ 100 Da} to 800 kDa 
of
Preferably , the polymer has a molecular weight in { HEAD ~ the range } of { TAIL ~ 100 Da } to 800 kDa
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH