A, Amino acid sequence of the murine Igα cytoplasmic domain.
B, Scheme of mutant Igα protein expressed as part of the BCR complex in IgαSATV/SATV mice.
C, Splenic B cells were stimulated with 5μg/106 cells anti-IgM for the indicated time points, lysed with 1%NP-40 buffer, separated by SDS-PAGE, and blotted as indicated. Bands were quantified after digital chemiluminescence acquisition. Blots shown are representative of four experiments performed with lysates from two independent experiments with three to four 8-12 week old mice each.