Results 251 to 260 of about 3,313,584 (302)

Evolutionary relationships of eukaryotic kingdoms

Journal of Molecular Evolution, 1996
The evolutionary relationships of four eukaryotic kingdoms--Animalia, Plantae, Fungi, and Protista--remain unclear. In particular, statistical support for the closeness of animals to fungi rather than to plants is lacking, and a preferred branching order of these and other eukaryotic lineages is still controversial even though molecular sequences from ...
S, Kumar, A, Rzhetsky
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Spiroplasmas: evolutionary relationships and biodiversity

Frontiers in Bioscience, 2006
Spiroplasmas are wall-less descendants of Gram-positive bacteria that maintain some of the smallest genomes known for self-replicating organisms. These helical, motile prokaryotes exploit numerous habitats, but are most often found in association with insects.
Laura B, Regassa, Gail E, Gasparich
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Origins and Evolutionary Relationships of Retroviruses

The Quarterly Review of Biology, 1989
As is the case for some other RNA viruses, the amino acid sequences of retroviral proteins change at an astonishing rate. For example, the proteases of the human immunodeficiency virus (HIV) and the visna lentivirus with which it is often compared are as different as the proteases of fungi and mammals, and those of the human type I leukemia virus are ...
R F, Doolittle, D F, Feng, M S, Johnson, M A, McClure   +3 more
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Evolutionary relationships among the serpins

Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences, 1993
Abstract The serpins are a widely distributed group of serine proteinase inhibitors found in plants, birds, mammals and viruses. Despite the great evolutionary divergence of these organisms, their serpins art highly conserved, both in sequence and structurally. Amino acid sequences were aligned by a combination of automatic algorithms
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Introduction to Inferring Evolutionary Relationships

Current Protocols in Bioinformatics, 2003
AbstractThis unit provides a general introduction to phylogeny. It defines common terms and discusses the issue of rooting trees, in addition to comparing gene and species trees. Methods for inferring phylogenies, such as distance methods, parsimony methods, and maximum likelihood are also presented.
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Analysis of an evolutionary species–area relationship

Nature, 2000
Large islands typically have more species than comparable smaller islands. Ecological theories, the most influential being the equilibrium theory of island biogeography, explain the species-area relationship as the outcome of the effect of area on immigration and extinction rates.
J B, Losos, D, Schluter
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Possible evolutionary relationships of the nitrogenase proteins

Journal of Molecular Evolution, 1976
Comparisons of the amino acid compositions of the nitrogenase proteins from different organisms and their correlation with cross-reactivities and taxonomical data suggest an evolution within bacterial genomes rather than within plasmids. Comparisons of the amino acid compositions of nitrogenases and other ATP-ases show similarities which might be due ...
D, Kleiner, W, Littke, H, Bender, K, Wallenfels   +3 more
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Evolutionary Relationships in the Genus Mus

1986
The Murids, with their many genera, are the most diversified and recent group of Rodents. Mus, along with Rattus and a few others, has been recognized as a separate taxon for a long time. One of its numerous species, the house mouse, has become the most studied vertebrate probably because its habitat is closest to that of man.
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Functional and evolutionary relationships of troponin C

Physiological Genomics, 2007
Striated muscle contraction is initiated when, following membrane depolarization, Ca2+binds to the low-affinity Ca2+binding sites of troponin C (TnC). The Ca2+activation of this protein results in a rearrangement of the components (troponin I, troponin T, and tropomyosin) of the thin filament, resulting in increased interaction between actin and myosin
Todd E, Gillis, Christian R, Marshall, Glen F, Tibbits   +2 more
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Evolutionary relationships in the genus Bordetella

Molecular Microbiology, 1987
SummaryThe nucleotide sequence of the pertussis toxin operon of Bordetella pertussis, Bordetella parapertussis and Bordetella bronchiseptica, has shown that the last two species contain many common mutations and are likely to derive from a common ancestor (Arico and Rappuoli, 1987).
B, Aricò, R, Gross, J, Smida, R, Rappuoli   +3 more
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