wherein {TAIL ~ the ampholytic ion pair} is {HEAD ~ 2 methacryloyloxyethyldimethylammonium} and 2 methacryloyloxyethane sulfonate 
wherein { TAIL ~ the ampholytic ion pair } is { HEAD ~ 2 methacryloyloxyethyldimethylammonium } and 2 methacryloyloxyethane sulfonate
OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH