As {HEAD ~ used herein “charge}” or “charged” refers to both negatively and positively charged metabolites or {TAIL ~ metabolites} that can be induced to have charge separation 
refers to
As { HEAD ~ used herein “ charge } ” or “ charged ” refers to both negatively and positively charged metabolites or { TAIL ~ metabolites } that can be induced to have charge separation
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL REL OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH