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The location of the centromere of chromosome III (CEN3) of Saccharomyces cerevisiae has been altered by means of transformation. The frequency of meiotic crossing over in the CEN3-PGK1 and LEU2-CEN3 intervals increases approximately 1.5- and fourfold, respectively, when CEN3 is repositioned at HIS4. The centromere-distal HIS4-LEU2 region experiences a three- to fivefold decrease in the frequency of meiotic exchange when CEN3 is repositioned at HIS4. The inhibition of meiotic crossing over is conferred by a 627-base-pair fragment of CEN3 DNA and is not dependent on the orientation of CEN3 relative to the rest of chromosome III.

REPRESSION OF MEIOTIC CROSSING OVER BY A CENTROMERE (CEN3) IN SACCHAROMYCES CEREVISIAE