Flow cytometric analysis of cell suspensions from (pooled axillary, inguinal, and brachial) lymph nodes of CD19-IE transgenic mice (B6 CD19-IE) and their nontransgenic littermates (B6).

The double stainings were performed with mAbs specific for the B-lineage markers B220 (FITC) or CD19 (FITC) and an MHC class II I-E specific mAb (PE). FITC, fluorescein isothiocyanate; PE, phycoerythrin.