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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | George, M. Milman, G. Ghangas, G. S. Mclaughlin, J. R. Lee, E. |
| Abstract | The spot corresponding to hypoxanthine phosphoribosyltransferase (HPRT; IMP:pyrophosphate phosphoribosyltransferase, EC 2.4.2.8) has been identified in two-dimensional polyacrylamide gels of HeLa cell extracts. This spot is absent in gels of 24 HPRT dificient mutants. A missense mutant displays a new HPRT spot at the same molecular weight but different isoelectric focusing position. Five independently isolated revertants of the missense mutant display spots corresponding to both the wild-type and mutant proteins indicating that they synthesize HPRT from two separate genes. If the missense protein is synthesized from a mutated form of the initially active HPRT gene, then wild-type HPRT protein in the revertants must be snythesized from a newly activated but prevously silent wild-type gene. The newly activated gene in the revertants of the missense mutation appears unstable producing a high frequency of spontaneous HPRT mutants. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 12 |
| Volume Number | 73 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1976-01-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | HeLa Cells Enzymology Hypoxanthine Phosphoribosyltransferase Metabolism Mutation Electrophoresis, Polyacrylamide Gel Epitopes Genes Immunology Research Support, U.S. Gov't, Non-P.H.S. Research Support, U.S. Gov't, P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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