The COR region, a gene cluster located on chromosome X of Saccharomyce
s cerevisiae and including genes CYC1, UTR1, UTR3, OSM1, tRNA(Gly) and
RAD7, was sequenced within the framework of the European Union genome
systematic sequencing project. It was compared with previously publis
hed sequences to be found in GenBank under the acronym YSCCORA. While
some of the discrepancies observed can be readily ascribed to polymorp
hism, others most probably result from sequencing errors. A revised ve
rsion of the sequence of the COR cluster is given. The sequence has be
en deposited in the EMBL Data Library under Accession Number L26347.