from these latter experiments we conclude that after 1-h incubation of 10 ( 6 ) cells with 1 microm lipid at 37 degrees c , 30 % of the cell-associated liposomes will have fused with the plasma membranes , resulting in the delivery of the contents of approximately 1.25 x 10 ( 5 ) liposomes into each cell .
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plasma membranes
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cell