Here we show a 3D DNA-FISH method to visualizes the 3D structure of the β-globin locus. Geometric size and shape measurements of the 3D rendered signals (128Kb) show that the volume of the β-globin locus decreases almost two fold upon gene activation. A decrease in length and a distinctive change in shape and surface structure of the locus are also observed. Adding 5’ and 3’end regions to the probe (175Kb) showed a less prominent change in length, shape and structure. It was shown (data not on this poster) that the physical distance between the two flanking regions shift in a similar limited manner, indicating that the flanking regions do not participate in ACH formation and thus active chromatin folding is occurring only within the locus proper.

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hdl.handle.net/1765/77701
10th international ELMI Meeting, EMBO Workshop on Advanced Light Microscopy Techniques and their Applications, EMBL Heidelberg
Biophysical Genomics, Department Cell Biology & Genetics

van de Corput, M., Knoch, T., de Boer, E., van Cappellen, G., Lesnussa, M., & Eussen, B. (2010). The 3D chromatin structure of the mouse β-haemoglobin gene cluster. Presented at the 10th international ELMI Meeting, EMBO Workshop on Advanced Light Microscopy Techniques and their Applications, EMBL Heidelberg. Retrieved from http://hdl.handle.net/1765/77701