Efficient κ LC expression by splenocytes and serum production. (A) Flow cytometric analysis of splenocytes. Freshly isolated spleen cells were stained with anti-κ fluorescent antibodies. Representative results for each strain are indicated. Numbers indicate percentages of total lymphocytes. (B) Summary of the results obtained in κ LC serum production. Mean κ LC levels from all experiments (± SEs in italics) are indicated on top of the graph in milligrams per milliliter. Each point represents data from an individual mouse. κNH indicates homozygous κ-Neo mice; κC/κD, heterozygous κ-CHEB/κ-del mice; and κCH, homozygous κ-CHEB mice.