NDLI: Gene density in the Giemsa bands of human chromosomes

Content Provider	Springer Nature Link
Author	Federico, Concetta Andreozzi, Letizia Saccone, Salvatore Bernardi, Giorgio
Copyright Year	2000
Abstract	The human genome is formed by isochores belonging to five families, L1, L2, H1, H2 and H3, that are characterized by increasing GC levels and gene concentrations. In-situ hybridization of DNA from different isochore families provides, therefore, information not only on the correlation between isochores and chromosomal bands, but also on the distribution of genes in chromosomes. Three subsets of R(everse) bands were identified: H3+, H3* and H3−, that contain large, moderate, and no detectable amounts, respectively, of the gene-richest H2 and H3 isochores, and replicate very early and early, respectively, in S phase of the cell cycle. Here, we investigated the GC levels, replication timings and DNA compaction of G(iemsa) bands. We showed that G bands comprise two different subsets of bands, one of which is predominantly composed of L1 isochores, replicates at the end of the S phase, has a higher DNA compaction relative to H3+ bands and corresponds to the darkest G bands of Francke (1994). In contrast, the other subset is composed of L2 and H1 isochores, has less-extreme properties in replication and composition and corresponds to the less-dark G bands of Francke.
Starting Page	737
Ending Page	746
Page Count	10
File Format	PDF
ISSN	09673849
Journal	Chromosome Research
Volume Number	8
Issue Number	8
e-ISSN	15736849
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2000-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Human Genetics Plant Genetics & Genomics Animal Genetics and Genomics
Content Type	Text
Resource Type	Article
Subject	Genetics

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