Results 191 to 200 of about 48,161 (219)

An interphase model for mitotic chromosome organization in eukaryota

Biosystems, 1981
A model for the spatial relationship of the arrangement of the chromosomes in the nucleus in eukaryota is presented. Evidence is derived from light and electron microscopic studies, application of autoradiographic and banding techniques; on the organization, structure and behaviour of chromosomes during interphase and other stages of cell cycle.
A.K. Sharma, U.C. Lavania
openaire   +3 more sources

Disordered nucleiome: Abundance of intrinsic disorder in the DNA‐ and RNA‐binding proteins in 1121 species from Eukaryota, Bacteria and Archaea

Proteomics, 2016
Intrinsically disordered proteins (IDPs) are abundant in various proteomes, where they play numerous important roles and complement biological activities of ordered proteins. Among functions assigned to IDPs are interactions with nucleic acids.
Chen Wang, V. Uversky, Lukasz Kurgan
semanticscholar   +1 more source

Comparative genomics provides insights into the evolutionary history of the phylum Ciliophora (Eukaryota, Alveolata) and uncovers the adaptive evolution of anaerobic ciliate classes

Zoologica Scripta
Ciliophora are one of the most diverse phyla of unicellular eukaryotes. Members of this group are widely distributed and have been found in several environments including those that are anaerobic.
Ying Zhang, Fasheng Liang, Yu Fu, Yong Chi, Wen Song, Alan Warren, Lifang Li   +6 more
semanticscholar   +1 more source

The ultrastructure of Carpediemonas membranifera (Eukaryota) with reference to the “excavate hypothesis”

European Journal of Protistology, 1999
Summary The ultrastructure of Carpediemonas membranifera , a small flagellate isolated from marine intertidal sediments, is presented for the first time. This protist has two flagella inserting at the anterior end of a feeding groove. The posterior flagellum bears three vanes. The cell has an anterior nucleus, a single dictyosome and a hydrogenosome-
David J. Patterson, Alastair G. B. Simpson   +1 more
openaire   +2 more sources

The ultrastructure of Trimastix marina Kent 1880 (Eukaryota), an excavate flagellate

European Journal of Protistology, 2000
Summary The ultrastructure of Trimastix marina is documented for the first time. This protist has four flagella which insert at the head of a longitudinal feeding groove. The basal bodies are elongate and arranged in a cruciate pattern. The anterior and posterior basal bodies lack cartwheels. The posterior flagellum bears two vanes.
Alastair G. B. Simpson, Catherine Bernard, David J. Patterson   +2 more
openalex   +3 more sources

Homologous Protein Domains in Superkingdoms Archaea, Bacteria, and Eukaryota and the Problem of the Origin of Eukaryotes

Biology Bulletin, 2005
The distribution of protein domains was analyzed in superkingdoms Archaea, Bacteria, and Eukaryota. About a half of eukaryotic domains have prokaryotic origin. Many domains related to information processing in the nucleocytoplasm were inherited from archaea.
А. В. Марков, А. М. Куликов   +1 more
openalex   +4 more sources

Interaction, functional relations and evolution of large and small subunits in Rubisco from Prokaryota and Eukaryota

Philosophical Transactions of the Royal Society of London. B, Biological Sciences, 1986
In early biological evolution anoxygenic photosynthetic bacteria may have been established through the acquisition of ribulose bisphosphate carboxylase-oxygenase (Rubisco). The establishment of cyanobacteria may have followed and led to the production of atmospheric oxygen.
Bruce A. McFadden, J. A. Torres-Ruiz, Henry Daniell, G. Sarojini   +3 more
openalex   +4 more sources

Alternative pathway (cyanobacteria to eukaryota)

1994
It is quite evident from the fossil record that prokaryotic cells were the first cell type evolved. After a long interval of nearly two billion years eukaryotic cells appeared. There is little doubt that this cell type arose from the bacterial cell. How this occurred has been the subject of much speculation.
openaire   +2 more sources

Concentration of Specific Amino Acids at the Catalytic/Active Centers of Highly-Conserved “Housekeeping” Enzymes of Central Metabolism in Archaea, Bacteria and Eukaryota: Is There a Widely Conserved Chemical Signal of Prebiotic Assembly?

Origins of Life and Evolution of Biospheres, 2010
J. Dennis Pollack, Xueliang Pan, Dennis K. Pearl   +2 more
openalex   +2 more sources

Eukaryotes (Eukaryota)

2009
Abstract Resolving the tree of life for eukaryotes is an important challenge for biologists. 7is challenge has largely been taken on by molecular evolutionists because of the increasing availability and ability of genome data to resolve ancient relationships, combined with the lack of an extensive fossil record from this period in ...
Debashish Bhattacharya, Hwan Su Yoon, S Blair Hedgesand, Jeremiah D Hackett   +3 more
openaire   +1 more source