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PMID: 7479936 Published · ppublish English Journal Article Research Support, Non-U.S. Gov't

The gene distribution of the maize genome.

Proceedings of the National Academy of Sciences of the United States of America ·Vol. 92 ·No. 24 ·1995-11-21 ·Pages 11057-60

Carels N, Barakat A, Bernardi G

Abstract

Previous investigations from our laboratory showed that the genomes of plants, like those of vertebrates, are mosaics of isochores, i.e., of very long DNA segments that are compositionally homogeneous and that can be subdivided into a small number of families characterized by different GC levels (GC is the mole fraction of guanine+cytosine). Compositional DNA fractions corresponding to different isochore families were used to investigate, by hybridization with appropriate probes, the gene distribution in vertebrate genomes. Here we report such a study on the genome of a plant, maize. The gene distribution that we found is most striking, in that almost all genes are present in isochores covering an extremely narrow (1-2%) GC range and only representing 10-20% of the genome. This gene distribution, which seems to characterize other Gramineae as well, is remarkably different from the gene distribution previously found in vertebrate genomes.

MeSH Terms
Base Composition DNA Transposable Elements Genes, Plant Zea mays/genetics
Chemicals
DNA Transposable Elements
Authors & Affiliations
3 authors, click to expand affiliations / ORCID
Carels N
Laboratoire de Génétique Moléculaire, Institut Jacques Monod, Paris, France.
Barakat A
Bernardi G
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Article Info
Journal
Proceedings of the National Academy of Sciences of the United States of America
Abbr.
Proc Natl Acad Sci U S A
ISSN
0027-8424
DOI
10.1073/pnas.92.24.11057
Published
1995-11-21
Pages
11057-60
Language
English
Region
United States
NLM ID
7505876
PMCID
PMC40570
Subset
IM
External Links
PubMed source DOI: 10.1073/pnas.92.24.11057 PMC Full Text View journal details
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