{HEAD ~ Arginine}, lysine, and {TAIL ~ glutamic acid} are preferably supplemented in the hydrogel matrix 
{ HEAD ~ Arginine } , lysine , and { TAIL ~ glutamic acid } are preferably supplemented in the hydrogel matrix
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH