Fig. 1.

Binding activity of 18 unique clones to 12 H3 strains and 1 H1 strain. A total of 104 clones were isolated. They produced 18 unique MAbs, and they were classified into 11 groups. The HA-binding ability of these MAbs was shown by Western blotting with representative clones of the respective groups. The binding activity to HAs of 12 H3 strains and 1 H1 strain was examined by ELISA. The OD values at 492 nm are indicated. Values greater than 1.0 are marked by red. Values between 0.5 and 1.0 are marked by orange. Values between 0.1 and 0.5 are marked by yellow.