{HEAD ~ The vector} is intended for {TAIL ~ the delivery} of therapeutic agents into specific mammalian tissues, especially low molecular weight agents, in particular low molecular weight anti cancer drugs into cancer tissues 
is intended for
{ HEAD ~ The vector } is intended for { TAIL ~ the delivery } of therapeutic agents into specific mammalian tissues , especially low molecular weight agents , in particular low molecular weight anti cancer drugs into cancer tissues
HEAD HEAD HEAD HEAD HEAD HEAD 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 OTH OTH OTH OTH OTH