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. 1981 Feb 11;9(3):503–517. doi: 10.1093/nar/9.3.503

Isolation, characterization and restriction endonuclease mapping of the Petunia hybrida chloroplast DNA.

W A Bovenberg, A J Kool, H J Nijkamp
PMCID: PMC327218  PMID: 6261223

Abstract

A procedure is developed for the isolation of intact chloroplast DNA (ctDNA) from Petunia hybrida. The molecular weight, calculated from contour length measurements, is 96.0 +/- 4.5 x 10(6) daltons. This value is in good agreement with the value of 101.2 x 10(6) daltons that was estimated from the electrophoretic mobilities of restriction endonuclease fragments of ctDNA. Analysis of petunia ctDNA in neutral CsCl gradients revealed the presence of only one type of DNA at a buoyant density of 1.6987 +/- 0.0005 gcm-3. This corresponds with a GC-content of 39.3 +/- 0.5%. A physical map of petunia ctDNA was constructed by using the restriction endonucleases Sal I, Bgl I, Hpa I and Kpn I. The map indicates that petunia ctDNA contains two copies of a sequence in an inverted orientation. The inverted repeat regions have a minimum length of 10 x 10(6) daltons. Hybridization data indicate that part of the inverted repeat regions contain the genes for chloroplast ribosomal RNAs.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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