Control of Yeast Gene Expression by Transposable Elements
The Ty (transposon yeast) elements of Saccharomyces cerevisiae comprise a family of dispersed, repeated DNA sequences (see Ref. 11, 13, and 19 for reviews). Each element consists of an internal region, referred to as epsilon, flanked by direct terminal repeats known as delta sequences. The epsilon region is approximately 5.4 kbp in length, and the delta sequences are about 335 bp long. The Ty elements display considerable sequence divergence. In general, the elements can be divided into two classes known as Ty1 and Ty2; these classes differ from each other by two large blocks of heterologous sequence. In the haploid genomes of most laboratory strains of yeast, there are 25 to 30 Ty1 elements and five to six Ty2 elements.
KeywordsTransposable Element Adjacent Gene Enhancer Element URA3 Gene Delta Sequence
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