Insertion of the eukaryotic transposable element Ty1 creates a 5-base pair duplication

Abstract
The his4-912 mutation results from insertion of a transposable element into the 5''-non-coding region of the his4 gene of yeast. A duplication of 5 base pairs of wild-type his4 DNA flanks the inserted element. The major class of His+ revertants result from excision of most of the transposable element, leaving an inserted segment of 334 base pairs flanked by the 5-base pair repeats.