Figure 1From: Localized, non-random differences in chromatin accessibility between homologous metaphase chromosomes Differential accessibility and equivalent accessibility patterns between metaphase chromosome homologs detected by single copy probes. A. Human chromosomes hybridized with single copy FISH probes developed from CACNA1B (2.23Â kb), HERC2 (1.81Â kb), and PMP22: IVS3 (2.32Â kb) (left to right) show differential hybridization between homologs. Arrows indicate the homolog with less fluorescence (or less accessibility). B. Examples of human cells with single copy FISH probes developed from within CCNB1 (2.47Â kb), C9orf66 (2.08Â kb), and BCR (3.4Â kb) (left to right) that show similar fluorescence intensities (or equivalent accessibility) between homologous regions. Chromosomes were counterstained with DAPI (converted to gray scale in image) and probes were labelled with digoxigenin d-UTP and detected with Cy3 digoxin antibody.Back to article page