FIG. 3.
Decreased serum immunoglobulin concentrations in p110δ−/− mice. Levels of immunoglobulin isotypes in serum in unimmunized wild type or p110δ-deficient mice were determined by ELISA. The values for each individual mouse tested are plotted on a logarithmic graph. Mean values are indicated by boldface lines. P values as determined by Student's t test are indicated.