An unusually high number of direct repeats detected by sequence analysis of the dispersed EcoRI-family fragments in Lupinus luteus L.

The Lupinus luteus genome contains a highly repetitive fraction of sequences named the EcoRI family. Two EcoRI molecules, 1071 and 1079 base pairs in length, were cloned, sequenced and compared. Analysis of the internal-sequence organization revealed a number of short direct repeats. Their involvement in the formation of the EcoRI-family fragments is postulated. Evidence is presented for the dispersed type of genomic organization of the EcoRI-family fragments.