using cdna probes for hprt and phosphoglycerate kinase ( pgk ) ( e.c.2.7.2.3 ) loci and biochemical assays for hprt and pgk enzymes , it was shown that bc6-13 cells , whether grown in nonselective medium , hat medium , or 6tg-containing medium , retain the hprt and pgk genes of both parental cells , but the m. car . forms of hprt and pgk were inactivated in cells treated with 6tg .
C1708726
loci
C0007634
cells