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noun
an enzyme, active chiefly in tumors and reproductive cells, that causes telomeres to lengthen: facilitates cell division and may account for the immortality of cancer cells.
Origin:
telomere + -ase
telomere + -ase
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source
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Telomerase
is always a great word to know.
So is doohickey. Does it mean:
| a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes. |
| a gadget; dingus; thingumbob. |
Collins
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
American Heritage
Science Dictionary
telomerase  (tə-lŏm'ə-rās', -rāz') Pronunciation Key
An enzyme that preserves the length of telomeres across cell divisions in germ cells, stem cells, and most cancer cells. A kind of reverse transcriptase, telomerase is an RNA-containing enzyme that synthesizes the DNA of telomeres by reverse transcription. It is active during DNA replication and is thought to play a role in the proliferation and apparent immortality of cells in which it is present. In cells that lack telomerase (that is, in most somatic cells of the body), the telomeres of chromosomes shorten and eventually disappear over repeated cell divisions. The inhibition of telomerase is being investigated as a method of killing cancerous cells. See more at telomere. |
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
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