Credit: DOMINIC WAITHE/SCIENCE PHOTO LIBRARY

Caption: Yeast plasmids (circular DNA, purple) are shown to be protected with the addition of telomeres from the protozoan Tetrahymena, enabled by the enzyme Telomerase. This demonstrates that the telomeres (book-end DNA, blue) have an evolutionarily-conserved structure and function, as yeast and protozoa are completely different types of organism.

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Keywords: 2009, animal, cell, cells, chromosome, chromosomes, conservation, conserved, deoxyribonucleic acid, dna, enzyme action, experiment, fungus, laureate, nobel prize, physiology or medicine, plasmid, plasmids, protected, protection, protozoan, repeat, saccharomyces, szostak, telomerase, telomere, telomeres, tetrahymena, yeast

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Chromosome protection by telomeres

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