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An enzyme that is found in the telomeres of chromosomes in germ cells, stem cells, and most cancer cells and that preserves the length of telomeres across cell divisions.
(Biochemistry) an enzyme that is involved in the formation and repair of telomeres, so that chromosomes are not shortened during cell division
te•lom•er•ase(təˈlɒm əˌreɪs, -ˌreɪz)
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.
[telomere + -ase]