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Parvularia
''Parvularia atlantis'' is a filopodiated amoeba which was isolated from a lake in Atlanta and deposited in the American Type Culture Collection ( ATCC) under the name ''Nuclearia sp.'' ATCC 50694 on 1997 by TK Sawyer. It was classified under the genus ''Nuclearia'' and morphologically resembles to ''Nuclearia'' species, although it is smaller (the diameter of the cell body measures approximately 4 µm compared to Nuclearia species, which range between 9-60 µm). Later it was determined that it phylogenetically belongs to a new nucleariid lineage., distantly related to ''Nuclearia'' and ''Fonticula'' genera –the other two previously described nucleriid genera–. Thus, ''Parvularia atlantis'' emerged as a new genus and a new species at the onset of Holomycota, which contain a set of phylogenetic and morphological characteristics that make this species unique. ''P. atlantis'' feeds on rod-shaped bacteria and present uni- or bi- nucleated cells. During its life cycle, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holomycota
Holomycota or Nucletmycea are a basal Opisthokont clade as sister of the Holozoa. It consists of the Cristidiscoidea and the kingdom Fungi. The position of nucleariids, unicellular free-living phagotrophic amoebae, as the earliest lineage of Holomycota suggests that animals and fungi independently acquired complex multicellularity from a common unicellular ancestor and that the osmotrophic lifestyle (one of the fungal hallmarks) was originated later in the divergence of this eukaryotic lineage. Opisthosporidians is a recently proposed taxonomic group that includes aphelids, Microsporidia and Cryptomycota, three groups of endoparasites. '' Rozella'' ( Cryptomycota) is the earliest diverging fungal genus in which chitin has been observed at least in some stages of their life cycle, although the chitinous cell wall (another fungal hallmark) and osmotrophy originated in a common ancestor of Blastocladiomycota and Chytridiomycota, which still contain some ancestral characteristics s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
David López-Escardó
David (; , "beloved one") (traditional spelling), , ''Dāwūd''; grc-koi, Δαυΐδ, Dauíd; la, Davidus, David; gez , ዳዊት, ''Dawit''; xcl, Դաւիթ, ''Dawitʿ''; cu, Давíдъ, ''Davidŭ''; possibly meaning "beloved one". was, according to the Hebrew Bible, the third king of the United Kingdom of Israel. In the Books of Samuel, he is described as a young shepherd and harpist who gains fame by slaying Goliath, a champion of the Philistines, in southern Canaan. David becomes a favourite of Saul, the first king of Israel; he also forges David and Jonathan, a notably close friendship with Jonathan (1 Samuel), Jonathan, a son of Saul. However, under the paranoia that David is seeking to usurp the throne, Saul attempts to kill David, forcing the latter to go into hiding and effectively operate as a fugitive for several years. After Saul and Jonathan are both killed in battle against the Philistines, a 30-year-old David is anointed king over all of History of ancie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atlanta
Atlanta ( ) is the capital and most populous city of the U.S. state of Georgia. It is the seat of Fulton County, the most populous county in Georgia, but its territory falls in both Fulton and DeKalb counties. With a population of 498,715 living within the city limits, it is the eighth most populous city in the Southeast and 38th most populous city in the United States according to the 2020 U.S. census. It is the core of the much larger Atlanta metropolitan area, which is home to more than 6.1 million people, making it the eighth-largest metropolitan area in the United States. Situated among the foothills of the Appalachian Mountains at an elevation of just over above sea level, it features unique topography that includes rolling hills, lush greenery, and the most dense urban tree coverage of any major city in the United States. Atlanta was originally founded as the terminus of a major state-sponsored railroad, but it soon became the convergence point among severa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ATCC (company)
ATCC or the American Type Culture Collection is a nonprofit organization which collects, stores, and distributes standard reference microorganisms, cell lines and other materials for research and development. Established in 1925 to serve as a national center for depositing and distributing microbiological specimens, ATCC has since grown to distribute in over 150 countries.Clark, W.A. and D. H. Geary. 1974. The Story of the American Type Culture Collection – Its History and Development (1899-1973). Advances in Applied Microbiology 17:295-309. It is now the largest general culture collection in the world. Products and collections ATCC's collections include a wide range of biological materials for research, including cell lines, microorganisms and bioproducts. The organization holds a collection of more than 3,000 human and animal cell lines and an additional 1,200 hybridomas. ATCC's microorganism collection includes a collection of more than 18,000 strains of bacteria, as well as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
TK Sawyer
TK may refer to: People *Tony Kanaan (born 1974), Brazilian racing driver *Tony Khan (born 1982), American businessman *Theodore K. Lawless (1892–1971), American dermatologist and philanthropist *T. K. Oommen (born 1937), Indian sociologist, author, and professor Places * Tehsil or taluk, an administrative division in several South Asian countries * Tokelau (ISO 3166-1 country code) * TK (South Korea) (Taegu–Kyŏngbuk), two administrative regions Arts and media Music * TK (Peruvian rock band) * TK Records, a record label * Tetsuya Komuro (born 1958), also known as TK, Japanese musician and producer * Toru Kitajima (born 1982), also known as TK from Ling Tosite Sigure, Japanese musician Television * Takeru "T.K." Takaishi, a character from ''Digimon'' anime * TK, a character in ''Angel Beats!'' Other media * TK, a identification prefix for Imperial stormtroopers in the classic era of the ''Star Wars'' universe * TK, the protagonist of the game '' Driver: Parallel Lines'' * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuclearia
''Nuclearia'' is a nucleariid genus. Species include: * Species ?'' Astrodisculus affinis'' Schouteden 1905 * Species ?'' Astrodisculus araneiformis'' Schewiakoff 1893 * Species ?'' Astrodisculus laciniatus'' Penard 1904 'Chlamydaster lacinatus'' (Penard 1904) Rainer 1968* Species ?'' Astrodisculus marinus'' Kufferath 1952 * Species ?'' Astrodisculus minutus'' Greeff 1869 * Species ?'' Heliophrys variabilis'' * Species ?'' Nuclearina similis'' * Species ?'' N. amphizonellae'' Penard 1917 * Species ?'' N. conspicua'' West 1903 * Species ?'' N. delicatula'' Cienkowsky 1865 * Species ?'' N. lohmanni'' Kufferath 1952 * Species ?'' N. pseudotenelloides'' * Species '' N. flavescens'' (Greef 1869) Patterson 1984 'Astrodisculus flavescens'' Greeff 1869* Species '' N. flavocapsulata'' (Greef 1869) Patterson 1984 [''Astrodisculus flavocapsulata'' Greeff 1869; ''Astrodisculus penari'' Roskin 1929; ''Astrodisculus serratus'' Walton 1930; ''Heliosphaerium polyedricum'' Frenzel 1897] * Speci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phylogenetics
In biology, phylogenetics (; from Greek φυλή/ φῦλον [] "tribe, clan, race", and wikt:γενετικός, γενετικός [] "origin, source, birth") is the study of the evolutionary history and relationships among or within groups of organisms. These relationships are determined by Computational phylogenetics, phylogenetic inference methods that focus on observed heritable traits, such as DNA sequences, protein amino acid sequences, or morphology. The result of such an analysis is a phylogenetic tree—a diagram containing a hypothesis of relationships that reflects the evolutionary history of a group of organisms. The tips of a phylogenetic tree can be living taxa or fossils, and represent the "end" or the present time in an evolutionary lineage. A phylogenetic diagram can be rooted or unrooted. A rooted tree diagram indicates the hypothetical common ancestor of the tree. An unrooted tree diagram (a network) makes no assumption about the ancestral line, and doe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fonticula
''Fonticula'' is a genus of cellular slime mold which forms a fruiting body in a volcano shape. As long ago as 1979 it has been known to not have a close relationship with either the Dictyosteliida or the Acrasidae, the two well-established groups of cellular slime molds. In 1979, ''Fonticula'' was made a new genus of its own due to the unique characteristics of its fruiting body, with only one species: ''Fonticula alba''. The life cycle of ''Fonticula alba'' alternates between an amoeboid vegetative stage and aggregative fruiting stage. The fruiting body of the genus has a unique shape, as its sorocarp resembles a volcano and sorus looks like a ball of hot lava emerging from that volcano. Molecular phylogenies have found alignments in genes of ''Fonticula alba'' to subgroups in Opisthokonta. A 2009 study has found that ''Fonticula'' is the sister taxa to ''Nuclearia'', thus making it related to the kingdom Fungi. ''Fonticula'', ''Nuclearia'', and Fungi have been united into th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Filopodia
Filopodia (singular filopodium) are slender cytoplasmic projections that extend beyond the leading edge of lamellipodia in migrating cells. Within the lamellipodium, actin ribs are known as ''microspikes'', and when they extend beyond the lamellipodia, they're known as filopodia. They contain microfilaments (also called actin filaments) cross-linked into bundles by actin-bundling proteins, such as fascin and fimbrin. Filopodia form focal adhesions with the substratum, linking them to the cell surface. Many types of migrating cells display filopodia, which are thought to be involved in both sensation of chemotropic cues, and resulting changes in directed locomotion. Activation of the Rho family of GTPases, particularly cdc42 and their downstream intermediates, results in the polymerization of actin fibers by Ena/Vasp homology proteins. Growth factors bind to receptor tyrosine kinases resulting in the polymerization of actin filaments, which, when cross-linked, make up t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Capsaspora
''Capsaspora'' is a monotypic genus containing the single species ''Capsaspora owczarzaki. C. owczarzaki'' is a single-celled eukaryote that occupies a key phylogenetic position in our understanding of the origin of animal multicellularity, as one of the closest unicellular relatives to animals. It is, together with ''Ministeria vibrans'', a member of the Filasterea clade (see “Taxonomy” below). This amoeboid protist has been pivotal to unravel the nature of the unicellular ancestor of animals, which has been proved to be much more complex than previously thought. Description ''C. owczarzaki'' was originally described as an amoeba-like “symbiont” of the fresh-water snail ''Biomphalaria glabrata''. The amoebae were obtained from the haemolymph of snails originally sampled in Puerto Rico. ''C. owczarzaki''’s life cycle comprises 3 different stages with three different cell types, which was reported only recently. Under culture conditions, ''C. owczarzaki’''s filopodial ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holozoa
Holozoa is a group of organisms that includes animals and their closest single-celled relatives, but excludes fungi. ''Holozoa'' is also an old name for the tunicate genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial n ... ''Distaplia''.'' Because Holozoa is a clade including all organisms more closely related to animals than to fungi, some authors prefer it to recognizing paraphyletic groups that mostly consists of Holozoa minus animals. Perhaps the best-known holozoans, apart from animals, are the choanoflagellates, which strongly resemble the collar cells of sponges, and so were theorized to be related to sponges even in the 19th century. '' Proterospongia'' is an example of a colonial choanoflagellate that may shed light on the origin of sponges. The affinities of the o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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