High-resolution idiogram of Giemsa R-banded human prophase chromosomes

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Abstract
The schematic representation of RHG-banded chromosomes (R-banding was produced by heat denaturation followed by Giemsa staining (RHG)) in the 850-band range per haploid set, was prepared showing the relative position, the specific size and the characteristic staining intensity for each band. To this idiogram was adapted the new International Standard Cytogenetic Nomenclature. The aim was to produce a realistic idiogram which could help in the preparation of R-banded prophase karyotypes and in the localization of chromosomal rearrangements. A comparative analysis of bands at prophase and metaphase revealed certain aspects of the dynamics involved in chromosome condensation, and in R-band organization. The effect of chromosome elongation on the appearance of R-bands within heterochromatic regions was also discussed.

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