Figure 5.
Lack of RF in sera of NZM2328 and its congenics. Human IgG was used as the substrate in A and C to detect anti-IgG activities. Mouse sera were used at a dilution of 1:50 for A and 1:250 for C. Rabbit IgG was used as the substrate in B and D with mouse sera diluted at 1:50 and 1:250, respectively. A pool of MRL/lpr+/+sera was used as a positive control showing readily detectable RF in this strain of mice.