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| Content Provider | PubMed Central |
|---|---|
| Author | Carrillo, N. Bogorad, L. |
| Abstract | An enzyme system prepared from maize chloroplasts catalyzes the synthesis of DNA from maize chloroplast DNA sequences cloned in bacterial plasmids. Cloned maize chloroplast DNA fragments Bam HI 17' (2470 bp) and Eco RI x (1368 bp) have been shown to be preferred templates for in vitro DNA synthesis catalyzed by pea chloroplast DNA polymerase preparations [Gold et al. (1987) Proc. Natl. Acad. Sci. USA 84, 194-198]. Analysis of replicative intermediates indicates that although the template activity of the recombinant plasmid pZmcBam 17' is substantially greater than that of the pZmcEco x, replication in both cases originates from within a 455 bp region which overlaps the two plasmids. The remaining approximately 1500 basepair portion of maize chloroplast BamHI fragment 17' is not more active because it contains additional origins for replication. The overlapping region shows sequence homology with a portion of the Chlamydomonas reinhardtii chloroplast chromosome that contains a replication origin. Replication is shown to proceed bidirectionally within the 455 bp origin region. Recombinant plasmid pZmc 427, which is also active in the in vitro DNA synthesis assay, promoted localized replication initiation within a 1 kbp Bg1II-Eco RI fragment of the chloroplast DNA insert, a region that includes the 3' terminal part of the psbA gene. |
| Starting Page | 5603 |
| File Format | |
| ISSN | 13624962 |
| e-ISSN | 13624962 |
| Journal | Nucleic Acids Research |
| Issue Number | 12 |
| Volume Number | 16 |
| Language | English |
| Publisher Date | 1988-06-24 |
| Access Restriction | Open |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Genetics |
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