Binding of biotinylated α2-3- and α2-6- linked sialic acid PAA-compounds to Memphis/31/98 (HG). Oligosaccharide bound to virus immobilized in wells of a microtiter plate was detected by AP-streptavidin as described in the Methods. The data points are mean of triplicates ± standard deviation. The line is the fit of the data to the standard binding equation generated using Kaleidagraph software. A similar experiment that shows the binding specificity of NWS-Mem/98 has been published .