Coexpression of mu and gamma 1 heavy chains can occur by a discontinuous transcription mechanism from the same unrearranged chromosome.


We previously documented that a single BCL1 leukemia cell can produce mu and gamma 1 immunoglobulin heavy chains with identical variable segments in an allelically excluded fashion without heavy chain constant region gene rearrangement. To understand the mechanism of dual mu/gamma 1 synthesis in BCL1 subclones, we have analyzed mature and pre-RNA at the… (More)


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