topoisomerases

Enzymes that assist in the topological manipulation of DNA. Before DNA can replicate it must be unwound. This occurs in short segments and is achieved by a Type I topoisomerase that cuts one strand so that the free end can be rotated around the unbroken strand. Topoisomerase 1 then re-ligates the broken strand. Type II topoisomerases cut both strands. The term is pronounced ‘topo-isomerase’. The derivation is Greek, topos , a place; iso , equal; meros , a part; with the -ase suffix denoting an enzyme.

单词	topoisomerases
释义	topoisomerases topoisomerases [¦tä·pō·ī′säm·ə‚rās·əz] (biochemistry) Any of a group of enzymes capable of relaxing, unwinding, unpackaging, or changing the degree of supercoiling of deoxyribonucleic acid fiber. topoisomerases topoisomerases Enzymes that assist in the topological manipulation of DNA. Before DNA can replicate it must be unwound. This occurs in short segments and is achieved by a Type I topoisomerase that cuts one strand so that the free end can be rotated around the unbroken strand. Topoisomerase 1 then re-ligates the broken strand. Type II topoisomerases cut both strands. The term is pronounced ‘topo-isomerase’. The derivation is Greek, topos , a place; iso , equal; meros , a part; with the -ase suffix denoting an enzyme.
随便看	dead horse ranch state park dead horse, to beat/flog a dead house deadhouse dead human body dea dia dead ice dead in bed dead-in-bed syndrome deading dead in ground dead in her tracks dead in his tracks dead in its tracks dead, injured, missing dead in my tracks dead in one's tracks dead in or an animal's tracks dead in our tracks dead in shell dead inside (concept) dead in somebody's tracks dead in (someone's or something's) tracks dead in someone's tracks dead in something's tracks