{HEAD ~ The complexes} are further covalently bonded with {TAIL ~ cationic carriers} and permeabilizer peptides for delivery across the blood brain barrier and with targeting moieties for uptake by target brain cells 
are covalently bonded with
{ HEAD ~ The complexes } are further covalently bonded with { TAIL ~ cationic carriers } and permeabilizer peptides for delivery across the blood brain barrier and with targeting moieties for uptake by target brain cells
HEAD HEAD HEAD HEAD HEAD HEAD REL OTH 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 OTH OTH OTH OTH