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| Content Provider | PubMed Central |
|---|---|
| Author | Devlin, J. J. Weiss, E. H. Paulson, M. Flavell, R. A. |
| Abstract | DNA restriction maps of the major histocompatibility complex and hybridization with low copy probes have previously revealed strong homology between the Q6-Q7 and the Q8-Q9 class I gene pairs in the Qa2 region of the C57BL/10 mouse. After DNA sequence analysis of the Q7, Q8 and Q9 genes, we have compared the Q7 gene with its apparent allele, 27.1, from the BALB/c mouse; the 99% homology between Q7 and 27.1 indicates that this is a non-polymorphic gene. Comparison of Q7 with Q9, its homologue in the Q8-Q9 gene pair, revealed greater than 99% homology, thus supporting our proposal that the Qa2 region has evolved by the duplication of gene pairs. Q7 was also found to be homologous (93%) to Q8, the second member of the Q8-Q9 pair. However, the first exon (encoding the leader sequence) as well as the first intron of Q7 and Q8, which are presumably not subject to strong selective pressure, are essentially identical in nucleotide sequence (having only one mismatch), which suggests that greater than 200 bp of DNA may have been exchanged by gene conversion. Furthermore, transcripts of both Q7 and Q8 would have termination codons derived from the exon that normally encodes the transmembrane domain, thus these genes could encode either membrane-bound class I proteins that lack a cytoplasmic protein domain or class I proteins that are secreted. |
| Starting Page | 3203 |
| File Format | |
| ISSN | 14602075 |
| e-ISSN | 14602075 |
| Journal | The EMBO Journal |
| Issue Number | 12 |
| Volume Number | 4 |
| Language | English |
| Publisher Date | 1985-12-01 |
| Access Restriction | Open |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Neuroscience Immunology and Microbiology Medicine Molecular Biology |
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