passages.id: split_1_test_130_passage
passages.type: progene_text
passages.text: Several functional anomalies of B-chronic lymphocytic leukemia ( B-CLL ) cells may be explained by abnormalities of the B-cell receptor ( BCR ) , a multimeric complex formed by the sIg homodimer and the noncovalently bound heterodimer Igalpha / Igbeta ( CD79a / CD79b ) .