A liposome composition for delivery of a nucleic acid in vivo or ex vivo is described. The liposomes in the composition are comprised of (i) a lipid that is neutral in charge at physiologic pH and positively charged at pH values less than physiologic pH and (ii) a lipid joined to a hydrophilic polymer by a dithiobenzyl linkage. The liposomes are associated with a nucleic acid for delivery to a cell.

 
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> 3terminal sequence of hepatitis C virus genome and diagnostic and therapeutic uses thereof

> Compounds for control of appetite, blood pressure, cardiovascular response, libido, and circadian rhythm

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