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| Content Provider | PubMed Central |
|---|---|
| Author | Stengelin, Martin K. Hoffman, Joseph F. |
| Copyright Year | 1997 |
| Abstract | The objective of this study has been to determine which Na,K-ATPase isoforms are expressed in red blood cells and whether kinetic differences in the uncoupled sodium efflux mode between the human red blood cell Na,K-ATPase and other preparations can be explained by differences in the underlying subunit composition. To this end, human reticulocyte RNA was isolated, reverse transcribed, amplified by PCR and appropriate primers, and sequenced. Primers from highly conserved areas as well as isoform-specific primers were used. The α1 and α3 isoforms of the α subunit, and the β2 and β3 isoforms of the β subunit were found. The complete coding regions of the cDNAs for the reticulocyte subunits were sequenced from overlapping PCR fragments. No difference was found between the reticulocyte isoforms and the ones already known. The fact that we found β2 but not β1 in reticulocyte single-stranded cDNA, and β1 but not β2 in a leukocyte library indicates that leukocyte contamination of our reticulocyte preparation was negligible. Analysis of a human bone marrow library showed that α1, α2, and α3 as well as all three β isoforms were present. The extent to which the kinetic properties of uncoupled sodium efflux might depend on different isoform combinations is not yet known. |
| Starting Page | 5943 |
| File Format | |
| ISSN | 10916490 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 11 |
| Volume Number | 94 |
| Language | English |
| Publisher | The National Academy of Sciences of the USA |
| Publisher Date | 1997-05-27 |
| Access Restriction | Open |
| Rights Holder | The National Academy of Sciences of the USA |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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