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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

A critical role of lambda 5 protein in B cell development.

The lambda 5 gene is a homolog of immunoglobulin J lambda-C lambda genes, expressed specifically in immature B-lineage cells. Lambda 5-encoded molecules form membrane complexes with mu or D mu proteins in association with an additional protein specifically expressed in immature B cells that is encoded by the Vpre-B gene. We have generated mice in which the lambda 5 gene is inactivated by targeted gene disruption in embryonic stem cells. In these mice, B cell development in the bone marrow is blocked at the pre-B cell stage. However, the blockade is leaky, allowing B cells to populate the peripheral immune system at a low rate. These cells are allelically excluded and able to respond to antigen.[1]


  1. A critical role of lambda 5 protein in B cell development. Kitamura, D., Kudo, A., Schaal, S., Müller, W., Melchers, F., Rajewsky, K. Cell (1992) [Pubmed]
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