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Maturation of BCR components. BJAB/babe (BJAB) and BJAB/K1 cells were metabolically labeled with [35S]methionine and [35S]cysteine for 30 min and chased for 1 and 4 h. Cells were lysed with 1% NP-40 buffer, and radioactively labeled lysates of BJAB/babe cells and BJAB/K1 cells were used for immunoprecipitation with an anti-μ, anti-Igα, or anti-Igβ antibody. Only the part of the gel displaying the μ chain, Igα, or Igβ is shown. The data were reproduced in three independent experiments.
