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  1. ...transcription ( Crouch and Toulme 1998 ). There appear to be three broadly distributed lineages of RNH enzymes: RNase HI ( rnhA gene), HII ( rnhB ), and HIII ( rnhC ; Ohtani et al. 1999 ). Common evolutionary ancestry has been firmly established for rnhB and rnhC , whereas rnhA may represent a case...
  2. ...-derived neurotoxin), RNASE3 (eosinophil cationic protein; Hamann et al. 1990 ), and ECRP (GenBank X55989). Multiple mouse-specific duplications produced at least six genes ( Ear-1, Ear-2 , and mR-3 through mR-6 ; Batten et al. 1997 ). Zhang and co-workers have previously shown that the eosinophil...
  3. ...by hybridization ( Johnson et al. 1992 ). We found a homolog of the human RPP21 subunit of the RNase P holoenzyme in this region, next to Trim39 (or Rnf23 ; Jarrous et al. 2001 ). View this table: In this window In a new window Table 1. Genes and Pseudogenes in the Mouse Telomeric Class I Region The H2-M region...
  4. ...reported in eukaryotes. In a pattern of apparent gene loss complementary to that seen in Methanococcus and Halobacterium, Thermoplasma acidophilum lacks the RNase P subunits. Unexpectedly, the identified exosomal superoperon, in addition to the predicted exosome components, encodes the catalytic...
  5. .... 3B).View larger version: In this window In a new window Figure 3. Distribution of DNA methylation in Spirodela chromosomes and TEs. (A) Circos plot (Krzywinski et al. 2009) of -wide distribution of DNA methylation densities by chromosome in Spirodela. From outside to inside: gene density; TE density...
  6. ...branch-specific superfamilies. These functions are defense (e.g., immunity), transcriptional regulation, and hormone-related signaling. Gene Duplication The presence of multiple copies of any particular SCOP domains within the proteome is the result of domain duplication and divergence during evolution...
  7. ...not detected. One copy of RNAse H II was not detected, but a second copy was, thus its functionality is clearly present. As well, M. mobile 's copy of ribosomal protein L36 ( rpmJ ) was not detected, but this particular gene has a suspicious phylogeny despite its conserved gene order with M. pulmonis and M...
  8. ...-specific endoribonuclease activity ( Sidrauski and Walter 1997 ). This activity is consistent with the C-terminal location for RNase activity found in its homolog, 2‘-5′ oligo (A)-dependent ribonuclease ( Bork and Sander 1993 ). Consequently, we tentatively suggest the presence of divergent PUG domains in the C termini...
  9. ...a model of molecular evolution. On a smaller scale, such ancestral reconstructions have been performed for protein families including rhodopsin ( Chang et al. 2002 ), ultraviolet vision gene SWS1 ( Shi and Yokoyama 2003 ), ribonucleases ( Jermann et al. 1995 ; Zhang and Rosenberg 2002 ), Tu elongation...
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