Chromosomal map positions of crl mutations and corresponding loci in the yeast genomic sequence: Left maps comprise chromosomal positions of crl mutations as had been determined by genetic mapping, respectively. Right maps comprise corresponding loci as found in the yeast genomic sequence (Source: MIPS database http://www.mips.biochem.mpg.de/). Bars indicate genetic distances (cM) and sequence distances (kb), respectively. crl mutations and predicted corresponding proteasomal genes are indicated by bold letters. Proteasomal genes are characterized as: YTA2, 19S AAA protein; YTA5, 19S AAA protein; SUN2, 19S non-ATPase; Y13, 20S α-type; PUP2, 20S α-type; PRE5, 20S α-type; PRE6, 20S α-type; YTA1, 19S AAA protein; and PUP1, 20S β-type. YTA1 related: not indicated as 19S cap subunit, homologous to YTA1.