segregation analysis of cho x mouse somatic cell hybrids allowed regional gene mapping assignments for a total of eight chinese hamster chromosome 3- or 4-derived marker loci ( the above six , plus aprt and pkm2 ) to cho chromosomes z3 , z4 , z5 , and z7 . for seven of these enzyme loci ( all but idh2 ) , two alleles are expressed in cho cells , each segregating with a different z-group chromosome .
C0008633
chromosomes
C1708726
loci