RSFTSTYL 8JAD ` !HpqrstxXyzd{  , !|$  and !xXydzd{  , !|$  and !u@}~, et al.vw ---!"HpqrstxXyzd{  , !|$  and !xXydzd{  , !|$  and !u@}~, et al.vw ---!#8 t    , !t    , !t    !t    !   (! ), !t    .!\Lt    , !t    , !t     , !t     , !t    .!t    , !t    , !x  in: ! t    , !t    , !t    , !t    ,!t   ! t     , !| $ eds., ! t     , !t     , !t    , !x  pp. ! t    .!$@   [!  ] !%'Prose from the different membrane-penetration properties of the two compounds. The time-course of accumulation and subsequent release of [14C]CP94 by the rat visceral yolk sac in-vitro was &e(0  ,!213@   [!  ]!48pqrstxXyzd{  , !|$  and !xXydzd{  , !|$  and !u@}~, et al.vw 5 the plasma and lysosome membranes rapidly whereas [14C]desferrioxamine and 125I-labelled poly(vinylpyrrolidone) are effectively incapable of crossing these membranes, entering cells only by endocytos64  -!74  ; !8@}~, et al.9:;  , !<=>?@PQZ  , !RSHpqrstxXyzd{  , !|$  and !xXydzd{  , !|$  and !u@}~, et al.vw ---!THpqrstxXyzd{  , !|$  and !xXydzd{  , !|$  and !u@}~, et al.vw ---!UVWY$ Ibid.!$ Ibid.!   `ab<dc, Anonymous!(@ABC `