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Science 10 June 1983:
Vol. 220. no. 4602, pp. 1179 - 1181
DOI: 10.1126/science.6857243
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Articles

Science, Vol 220, Issue 4602, 1179-1181
Copyright © 1983 by American Association for the Advancement of Science

articles

Somatic mutations of immunoglobulin variable genes are restricted to the rearranged V gene

J Gorski, P Rollini, and B Mach

An important question concerning the mechanism of somatic mutation of immunoglobulin variable (V) genes is whether it involves all of the numerous V genes in a differentiated B cell, independent of location, or if it is restricted to a particular chromosomal site. Comparison of the sequence of two alleles of a given V gene shows that the mutations are limited to the rearranged V gene, while the same V gene on the other chromosome has not undergone mutation. This indicates that a V gene sequence alone is not sufficient for somatic mutation to take place. The mutation is therefore restricted to the rearranged V gene and consequently does not occur before rearrangement.


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