{HEAD ~ Various grades} of pectin are commercially available in {TAIL ~ different degrees} of methyl esterification and in different ranges of molecular weights, i.e. different degrees of disaggregation 
are commercially available in
{ HEAD ~ Various grades } of pectin are commercially available in { TAIL ~ different degrees } of methyl esterification and in different ranges of molecular weights , i.e. different degrees of disaggregation
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH