Words similar to ciliates
Example sentences for: ciliates
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While the allele composition of the 81-locus is identical in each pair of karyonides, the karyonides are not otherwise genetically identical (unlike sister karyonides in many ciliates; e.g. , see [ 59 ] ), but are independently derived, so that the backgrounds differ between karyonides, which might explain these slight variations.
Analogous phenomena have been described in other ciliates [ 28 29 30 31 ] .
The in vitro properties of telomerase are consistent with its known role in creation of MAC telomeres in Tetrahymena [ 41 ] , as well as, presumably, in all other ciliates [ 9 ] . Telomerases from exconjugants of Tetrahymena and Euplotes have been extensively studied in vitro . The E. crassus enzyme can only act on oligomers that pair with telomerase template RNA at their 3' terminus, unless assisted by a dissociable factor (chromosome healing factor), which contributes extra mass to the enzyme in exconjugants [ 42 ] . Telomerase, assisted by this factor, still requires a block of dGs or telomere repeats internal to the 3' primer end [ 43 ] . In contrast, the Tetrahymena exconjugant enzyme can add to a primer completely devoid of telomere repeats in special reaction conditions, and shows no evidence of increased mass beyond that of the vegetative enzyme [ 44 ] .
We predict that a loose complex will be found in ciliates between telomerase and a cbs-directed binder-cutter activity.
The exact nucleotide positions where telomere repeats are added have been examined in several ciliates (reviewed by [ 23 53 ] ). Cloned chromosome ends from 81 MAC family indicated heterogeneity of TAS placement, which we attributed to exonuclease erosion of the broken ends prior to telomerase action [ 27 ] . Analogous multi-TAS regions have been described in Tetrahymena ( [ 49 ] ; E. Hamilton and E. Orias, pers.
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