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The Mass of Human Chromosomes Measured for the First Time


 
The spread of 46 human chromosomes measured using X-rays in the study, with colour added. Credit: Archana Bhartiya et al/ Chromosome Research
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The mass of human chromosomes, which contain the instructions for life in nearly every cell of our bodies, has been measured with X-rays for the first time in a new study led by UCL researchers.
For the study, published in Chromosome Research, researchers used a powerful X-ray beam at the UK s national synchrotron facility, Diamond Light Source, to determine the number of electrons in a spread of 46 chromosomes which they used to calculate mass.
They found that the chromosomes were about 20 times heavier than the DNA they contained - a much larger mass than previously expected, suggesting there might be missing components yet to be discovered. ....

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