Alignment ofSfiI sites with theNotI restriction map ofSchizosaccharomyces pombegenome

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Abstract
A Sfi I restriction map of the fission yeast Schizosaccharomyces pombe genome was aligned with the Not I restriction map. There are 16 Sfi I sites in the S. pombe genome. Three Sfi I sites are on chromosome III which is devoid of Not I sites. The sizes of the entire genome and individual chromosomes, calculated from the Sfi I fragment sizes, are consistent with that calculated from the Not I fragment sizes. The Sfi I map provides greater physical characterization of the S. pombe genome and further validates the use of S. pombe chromosomal DNA as size standard. These maps have allowed detection of polymorphism on all three chromosomes.