Simple DNA sequences and dispersed repetitive elements in the vicinity of mouse immunoglobulin K light chain genes

The simple DNA sequences (T-G)20, (T-T-T-G-C)20 and (G-C-C-T-C-T)30 were found in the vicinity of mouse immunoglobulin genes and of dispersed repetitive elements as the R, B1 and B2 sequences. On the basis of sequence data, blot hybridizations with salmon and mouse DNA and with defined mouse DNA fragments, possible functional and evolutionary aspects of simple DNA sequences are discussed.