Abstract
Chromosomes V and VIII of S. cerevisiae were dissected and ordered clone banks were constructed and characterized. Each bank contains almost the entire chromosome from the left to the right telomere except for a small gap in each case. The size of the banks constructed is in good agreement with the physical length of these chromosomes, 580 kb, estimated by pulsed-field gel electrophoresis. The remaining gap in the ordered clone bank of chromosome V was found to be only 1.6 kb in length and to contain a 1.5 kb-long portion of one of the two Ty elements located in tandem. The gap in the bank of chromosome VIII was 6.4 kb in length and contained four copies of the CUP1 gene. A genomic restriction map analysis of the corresponding region of chromosome VIII revealed that a unit of about 2 kb in length harbouring the CUP1 gene was repeated ten times in strain DC5 rho degrees which was used for the bank construction. A 588.5 kb-long high resolution physical map for chromosome V and a 585.6 kb-long one for chromosome VIII have thus been established.
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