Abstract
The ordered clone library of chromosome VI of Saccharomyces cerevisiae has been constructed by Olson et al. [Proc. Natl. Acad. Sci. USA 83 (1986) 7826–7830, and personal communication]. It is composed of four contiguous stretches from the chromosome, each of 40–70 kb. There remained three gaps of unknown length between these four contigs. We applied the ‘gap-repair’ method to clone these three gap regions directly from the yeast chromosome. All three gap regions, ranging from 7 to 22 kb, were successfully cloned without any structural changes. Together with these gap regions, a precise physical map of EcoRI and HindIII sites was constructed over the 230-kb fragment which covers most of chromosome VI except for two telomeres.
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