Abstract
CH allotypes were determined for rabbit IgG and antibody molecules identified and isolated on the basis of their expression of latent group a (VH) allotypic determinants. Serologic and chemical typing of the purified molecules revealed that five out of 10 individual preparations studied expressed d allotypes not present in the rabbit as a nominal allotype. None of the latent VH-CH combinations represented products of a new or unusual arrangement of VH and CH structural genes. This result indicates that the molecules with latent allotypes express their VH and CH allotypes in the same combinations as do their nominal counterparts and do not result from misspairing of separate genes involved in H chain synthesis.
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