to determine if vsg was in association with lipid , membranes and lipoproteins in plasma of infected rats ( irp ) , vsg isolated from plasma ( pvsg ) , and vsg isolated from trypanosomal homogenates ( hvsg ) were all concentrated by ultracentrifugation and assayed for the presence of vsg by radial immunodiffusion ( minimum level of detection , 25 micrograms/ml ) and by immunoelectroblots ( minimum level of detection , 1 microgram/ml ) .
C0023779
lipid
C0023820
lipoproteins