5,781 Results
for term "sites"
- Genome-Wide Characterization of Tetrahymena thermophila Chromosome Breakage Sites. I. Cloning and Identification of Functional Sites...for publication May 10, 2005 ABSTRACT The chromosomes of the macronuclear (expressed) genome of Tetrahymena thermophila are generated by developmental fragmentation of the five micronuclear (germline) chromosomes. This fragmentation is site specific and directed by a conserved 15-bp chromosome breakage sequence ~~~
- Genome-Wide Characterization of Tetrahymena thermophila Chromosome Breakage Sites. II. Physical and Genetic Mapping...) genome of Tetrahymena thermophila are generated by developmental fragmentation of the five micronuclear (germline) chromosomes. This fragmentation is site specific, directed by a conserved chromosome breakage sequence (Cbs element). An accompanying article in this issue reports the development ~~~
- Effects of Natural Selection on Interpopulation Divergence at Polymorphic Sites in Human Protein-Coding Loci...was evidence of purifying selection acting at these sites, which in turn causes a reduction in interpopulation divergence. By contrast, a small number of SNP sites in these categories revealed unusually high genetic distances between the two most diverged populations (African and Asian); these loci may have ~~~
- Codon-Substitution Models for Heterogeneous Selection Pressure at Amino Acid Sites...5 1 meaning neutral mutations, v , 1 purifying selection, and v . 1 diversifying positive selection. Amino acid sites in a protein are expected to be under different selective pressures and have different underlying v ratios. We develop models that account for heterogeneous v ratios among amino acid ~~~
- The Expected Number of Heterozygous Sites in a Subdivided Population...of heterozygous sites per individual at equilibrium in a subdivided population. The model of innitely many neutral sites is posited; the linkage map is arbitrary. The monoecious, diploid population is subdivided into a nite number of panmictic colonies that exchange gametes. The backward migration matrix ~~~
- A Screen for Modifiers of Cyclin E Function in Drosophila melanogaster Identifies Cdk2 Mutations, Revealing the Insignificance of Putative Phosphorylation Sites in Cdk2...Copyright 2000 by the Genetics Society of America A Screen for Modiers of Cyclin E Function in Drosophila melanogaster Identies Cdk2 Mutations, Revealing the Insignicance of Putative Phosphorylation Sites in Cdk2 Mary Ellen Lane,1 Marion Elend,2 Doris Heidmann, Anabel Herr, Sandra Marzodko ~~~
- The Allele-Specific Suppressor sup-39 Alters Use of Cryptic Splice Sites in Caenorhabditis elegans...Copyright 2000 by the Genetics Society of America The Allele-Specic Suppressor sup-39 Alters Use of Cryptic Splice Sites in Caenorhabditis elegans A. Brock Roller, David C. Hoffman and Alan M. Zahler Department of Biology and Center for Molecular Biology of RNA, University of California, Santa ~~~
- Correlation Between the Substitution Rate and Rate Variation Among Sites in Protein Evolution...ABSTRACT It is well known that the rate of amino acid substitution varies among different proteins and among different sites of a protein. It is, however, unclear whether the extent of rate variation among sites of a protein and the mean substitution rate of the protein are correlated. We used two ~~~
- Preferential transposition of Drosophila P elements to nearby chromosomal sites....Copyright 0 1993 by the Genetics Society of America Preferential Transposition of Drosophila P Elements to Nearby Chromosomal Sites John Tower, Gary H. Karpen,* Nancy Craig3 and Allan C. Spradling Howard Hughes Medical Institute Research Laboratories, Carnegie Institution of Washington, Baltimore ~~~
- Two Sites in the Delta Gene Region Contribute to Naturally Occurring Variation in Bristle Number in Drosophila melanogaster...the signicance of the molecular marker with the largest effect on bristle variation in four genetic backgrounds relative to permuted data-sets, found two sites that were independently associated with variation in bristle number. A common site in the second intron of Delta affected only sternopleural ~~~

