The present invention provides compounds for treating or preventing an HIV infection, or treating AIDS or ARC comprising administering a compound according to formula I where Ar, R.sup.1-R.sup.5, R.sup.11c and X.sup.1 are as defined herein. ##STR00001##

 
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> Cytokine polypeptides and antibodies containing a signal sequence for the attachment of glycosylphosphatidylinositol

> Card domain containing polypeptides, encoding nucleic acids, and methods of use
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