“…This appears to be the case for chromosomes I11 and XIV, where five pairs of duplicate genes (coding for three proteins and two tRNAs) have been found flanking the centromeres, but these are interspersed with genes unique to one chromosome (Lalo et al, 1993). Extensive sequence data around centromeres is at present only available for six of the 16 yeast chromosomes: I, 11, 111, IV, XI and XIV (Clark et al, 1993;this study;Oliver et al, 1992;Mann and Davis, 1986;Dusterhoft and Philippsen, 1992;Lalo et al, 1993), and already two pairs of duplicate centromeres are apparent. Since duplication of a centromere is likely to lead to (Chen et al, 1993; nucleotides 1518-2222 of database accession number L07603) and Streptomycesfradiae (Siemieniak et al, 1990; nucleotides 47445109 and 51 11-5521 of accession number M29297).…”