Words similar to fission
Example sentences for: fission
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While human E1 is highly similar to its fission yeast counterpart (data not shown), inspection of the S. pombe genome revealed fourteen potential UBCs, none of which is an obvious homologue of human UBC3 or budding yeast Cdc34p, since all lack the characteristic C-terminal extension (data not shown).
Accordingly, it needs to be emphasized that we can only infer the most likely scenario under the assumption that the probabilities of fusion and fission are comparable.
As described previously in this paper and elsewhere [ 38 ] , the biology of fission yeast facilitates the identification of MII segregation defects that are difficult to detect in other organisms that terminate meiotic progression or produce inviable meiotic products as a consequence of defects in meiotic chromosome dynamics.
Several lines of evidence suggest that the SCF pathway is also conserved in the fission yeast Schizosaccharomyces pombe . Pcu1p, a Cdc53p/CUL1-related protein, was shown to associate with two different F-box/WD repeat proteins, Pop1p and Pop2p, when overexpressed [ 18 ] . In addition, genetic studies demonstrated that both of these F-box proteins are simultaneously required for efficient destruction of Rum1p and the replication initiator Cdc18p [ 18 19 20 ] . Rum1p is a Sic1p-analogous CDK inhibitor, which accumulates in G1, but is degraded as cells enter S phase [ 21 22 ] . Failure to degrade Rum1p is the major phenotypic defect of pop1 and pop2 deletion strains, which leads to disturbance of normal cell cycle progression, resulting in polyploidy [ 18 19 20 23 ] . Based on the genetic data and the biochemical observation that Pop1p and Pop2p interact when overexpressed, a putative SCF Pop1p-Pop2pcomplex was proposed, which would contain the heterooligomerizing F-box proteins Pop1p and Pop2p bound to SCF core components [ 18 20 ] .
Proteasomes translocated to meiotic spindles of rat oocytes and MG-132 induced-inhibition of proteasomal activity resulted in partial segregation of chromosomes during meiosis I [ 42 ] . Moreover, defective proteasomal activity in fission yeast impaired chromosome segregation [ 38 ] .
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