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Evolution by the birth-and-death process in multigene families of the vertebrate immune system

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Nei, Masatoshi, Gu, Xun, Sitnikova, Tatyana·1997·Proceedings of the National Academy of Sciences

Abstract

Concerted evolution is often invoked to explain the diversity and evolution of the multigene families of major histocompatibility complex (MHC) genes and immunoglobulin (Ig) genes. However, this hypothesis has been controversial because the member genes of these families from the same species are not necessarily more closely related to one another than to the genes from different species. To resolve this controversy, we conducted phylogenetic analyses of several multigene families of the MHC and Ig systems. The results show that the evolutionary pattern of these families is quite different from that of concerted evolution but is in agreement with the birth-and-death model of evolution in which new genes are created by repeated gene duplication and some duplicate genes are maintained in the genome for a long time but others are deleted or become nonfunctional by deleterious mutations. We found little evidence that interlocus gene conversion plays an important role in the evolution of MHC and Ig multigene families.

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Metadata

Authors
Nei, M., Gu, X., & Sitnikova, T.
Venue
Proceedings of the National Academy of Sciences
Published
1997-07-22
Volume
94
Issue
15
Pages
7799-7806
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2048912867
Cited by
793
References
3
FWCI
26.88
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Evolution by the birth-and-death process in multigene families of the vertebrate immune system. https://app.cochat.ai/papers/10.1073/pnas.94.15.7799
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Nei, M., Gu, X., & Sitnikova, T. (1997). Evolution by the birth-and-death process in multigene families of the vertebrate immune system. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.94.15.7799

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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