Truncated repeated sequences generated by recombination in a specific region.

Structural relationships within a family of long repeated DNA sequences have been determined by molecular cloning of individual family members. About half of the family members are truncated at one end. There is a short, tandemly repeating region flanked by direct repeats associated with truncation. Recombination in a region near the tandemly repeating segment has apparently generated much of the diversity in this family.