a method of inhibiting parasitic activity is disclosed in which the biosynthesis , structure and / or function of the glycotyl phosphatidylinositol anchor of said parasite may be affected by incorporating into said gpi anchor selected analogs of myristic acid containing various heteroatoms , substituents and unsaturated bonds , including ester - containing analogs , ketocarbonyl - containing analogs , sulfur - containing analogs , double bond - and triple bond - containing analogs , aromatic moiety - containing analogs , nitrated analogs and halogenated analogs .