Open AccessLinkage of the MBG locus to another functionally hemizygous gene locus (IDH2) on chromosome Z3 in Chinese hamster ovary cells.
Author(s) -
Gerald M. Adair,
Michael J. Siciliano
Publication year - 1985
Publication title -
molecular and cellular biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.14
H-Index - 327
eISSN - 1067-8824
pISSN - 0270-7306
DOI - 10.1128/mcb.5.1.109
Subject(s) - biology , chinese hamster ovary cell , locus (genetics) , genetics , genetic linkage , gene , gene mapping , chromosome , microbiology and biotechnology , cell culture
To gain insight into the nature of hemizygosity in Chinese hamster ovary (CHO) cells and the mechanisms by which it has arisen, we are attempting to map and determine linkage relationships for as many hemizygous loci as possible. In this study, we have shown by segregation analysis of intraspecific somatic cell hybrids that the hemizygous gene locus associated with resistance to methylglyoxalbisguanyl hydrazone (MBG) in CHO cells is linked to the hemizygous IDH2 locus on chromosome Z3. Nine of the ten autosomal hemizygous gene loci that have been mapped to date in CHO cells are clustered on three chromosomes, with five such markers on chromosome 2, two on chromosome 8, and now two on the Z3 chromosome. With the mapping of MBG to the Z3 chromosome, selectable drug resistance markers are now available on eight different CHO chromosomes.