Isolation of {HEAD ~ pectin} from {TAIL ~ plant cell walls} is achieved by breaking up the gel structure, usually stabilized by calcium cations, to solubilize large aggregates of pectin 
from
Isolation of { HEAD ~ pectin } from { TAIL ~ plant cell walls } is achieved by breaking up the gel structure , usually stabilized by calcium cations , to solubilize large aggregates of pectin
OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH