Figure 4
From: Receptor binding specificity of recent human H3N2 influenza viruses
Hemadsorption of chicken and human red blood cells to cell surface-expressed HA. Red cells were bound to recombinant HA expressed on the surface of Sf-9 cells and to influenza HA expressed on MDCK cells. Bound red cells were lysed with water and released hemoglobin was measured at 540 nm. The results shown are an average of 4 experiments ± standard deviation.