The Journal of Experimental Medicine
BioLegend: PerCP, PerCP/Cy5.5 Ab Conjugates
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Journal of Experimental Medicine, Vol 173, 711-720, Copyright © 1991 by Rockefeller University Press


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Virus-transformed pre-B cells show ordered activation but not inactivation of immunoglobulin gene rearrangement and transcription

MS Schlissel, LM Corcoran and D Baltimore
Whitehead Institute, Cambridge, Massachusetts 02142.

Virus-transformed pre-B cells undergo ordered immunoglobulin (Ig) gene rearrangements during culture. We devised a series of highly sensitive polymerase chain reaction assays for Ig gene rearrangement and unrearranged Ig gene segment transcription to study both the possible relationship between these processes in cultured pre-B cells and the role played by heavy (H) chain (mu) protein in regulating gene rearrangement. Our analysis of pre-B cell cultures representing various stages of maturity revealed that transcription of each germline Ig locus precedes or is coincident with its rearrangement. Cell lines containing one functional rearranged H chain allele, however, continue to transcribe and to rearrange the allelic, unrearranged H chain locus. These cell lines appear to initiate but not terminate rearrangement events and therefore provide information about the requirements for activating rearrangement but not about allelic exclusion mechanisms.
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