The liposomes have an inside/outside ion gradient sufficient to retain the topoisomerase I inhibitor or topoisomerase {HEAD ~ I/II inhibitor} within {TAIL ~ the liposomes} at the specified concentration 
within
The liposomes have an inside / outside ion gradient sufficient to retain the topoisomerase I inhibitor or topoisomerase { HEAD ~ I / II inhibitor } within { TAIL ~ the liposomes } at the specified concentration
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH