The trans-sialidase from the trypomastigote stage of Trypanosoma cruzi
was metabolically labeled with [H-3]-palmitic acid and purified by im
munoprecipitation with a monoclonal antibody. The action of PI-PLC on
the immunoprecipitate released a lipid that was analyzed by TLC. Lyso-
1-O-hexadecylglycerol and N-palmitoyl-sphinganine were obtained in a 1
:3 ratio, A comparison with the GPI anchors present in the different s
tages of T. cruzi was made.