A new V gene expressed in lambda‐2 light chains of the mouse

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Abstract
We have partially sequenced the light chain variable regions expressed in three IgM-producing hybridomas generated from newborn mice or from manipulated animals suppressed for IgM production. In these lines a new V gene (V-lambda-X), exhibiting less than 60% homology to any known lambda or kappa V gene, is rearranged to J-lambda-2. The light chains produced by these cells contain the lambda-2 constant domain, but are not recognized by goat antisera raised against conventional mouse lambda light chains.