Chromosome with telomeres

Chromosome with telomeres
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Illustration of a chromosome with telomeres (red). A telomere is the single-stranded end of a chromosome. Due to their biochemical traits, they are shortened during every replication of the DNA. As soon as the telomere is too short, the cell dies or stops growing. A theory says that this might be the reason for aging.

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 - Uploaded at 24.12.2010
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