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Iole (genus)
''Iole'' is a genus of songbirds in the bulbul family (biology), family, Pycnonotidae. They are native to tropical eastern Asia, from India to China and south through Southeast Asia to northern Indonesia. Taxonomy and systematics While some older sources merge this genus into ''Hypsipetes'', this is neither advisable nor technically correct. The two genera stand well apart, and to phylogenetically justify their merging, the entire "''Hypsipetes'' group" of bulbuls would need to be united in a single genus. That would include ''Hemixos'', ''Ixos'', ''Microscelis'' and ''Tricholestes'', and probably also ''Alophoixus'' and the monotypic ''Setornis''. The hook-billed bulbul may in fact be the closest living relative to the species in ''Iole'', but altogether the present genus may well be a quite basal (evolution), basal lineage of the traditional "''Hypsipetes'' group" of bulbuls, with no particularly close relatives among any of these other genera.Gregory (2000), Pasquet ''et al.'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Buff-vented Bulbul
The buff-vented bulbul (''Iole crypta'') is a species of songbird in the bulbul family, Pycnonotidae. It is found in south-eastern Myanmar, south-western Thailand, on the Malay Peninsula, Sumatra and nearby islands. Its natural habitat is subtropical or tropical moist lowland forests. It is threatened by habitat loss. Taxonomy and systematics The former scientific name, ''Iole olivacea'' Blyth, 1844, has now been ruled as permanently invalid by the IOC. Some authorities have classified the buff-vented bulbul in the genera ''Hypsipetes'' and ''Microscelis''. Formerly, Charlotte's bulbul was considered as conspecific with the buff-vented bulbul until split by the IOC The International Olympic Committee (IOC; , CIO) is the international, non-governmental, sports governing body of the modern Olympic Games. Founded in 1894 by Pierre de Coubertin and Demetrios Vikelas, it is based in L ... in 2017. Alternate names for the buff-vented bulbul include the cr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hook-billed Bulbul
The hook-billed bulbul (''Setornis criniger'') is a species of songbird in the bulbul family, Pycnonotidae. It is found in eastern Sumatra and Borneo, where its natural habitats are subtropical or tropical moist lowland forest and subtropical or tropical swamps. It is threatened by habitat loss. Alternate names for the hook-billed bulbul include the long hook-billed bulbul and long-billed bulbul. While currently monotypic In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unisp ... within the genus ''Setornis'', originally the genus contained the hairy-backed bulbul (now ''Tricholestes criniger viridis''). References External linksBirdLife Species Factsheet. Pycnonotidae Bulbuls Birds of Sumatra Birds of Borneo Birds described in 1839 Taxa named by René Lesson Taxonomy article ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. Other ways of defining species include their karyotype, DNA sequence, morphology (biology), morphology, behaviour, or ecological niche. In addition, palaeontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. About 14% of these had been described by 2011. All species (except viruses) are given a binomial nomenclature, two-part name, a "binomen". The first part of a binomen is the name of a genus to which the species belongs. The second part is called the specific name (zoology), specific name or the specific ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wastebin Taxon
Wastebasket taxon (also called a wastebin taxon, dustbin taxon or catch-all taxon) is a term used by some taxonomists to refer to a taxon that has the purpose of classifying organisms that do not fit anywhere else. They are typically defined by either their designated members' often superficial similarity to each other, or their ''lack'' of one or more distinct character states or by their ''not'' belonging to one or more other taxa. Wastebasket taxa are by definition either paraphyletic or polyphyletic, and are therefore not considered valid taxa under strict cladistic rules of taxonomy. The name of a wastebasket taxon may in some cases be retained as the designation of an evolutionary grade, however. Examples There are many examples of paraphyletic groups, but true "wastebasket" taxa are those that are known not to, and perhaps not intended to, represent natural groups, but are nevertheless used as convenient groups of organisms. The acritarchs are perhaps the most famous exa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus Name
Genus (; : genera ) is a taxonomic rank above species and below family as used in the biological classification of living and fossil organisms as well as viruses. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. ''Panthera leo'' (lion) and ''Panthera onca'' (jaguar) are two species within the genus ''Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants of an ancestral taxon are grouped together (i.e. phylogenetic analysis should clearly demonstrate both monophyly and validity as a separate lineage). # re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MT-RNR2
Mitochondrially encoded 16S RNA (often abbreviated as ''16S'') is the mitochondrial large subunit ribosomal RNA that in humans is encoded by the MT-RNR2 gene. The MT-RNR2 gene also encodes the Humanin polypeptide that has been the target of Alzheimer's disease research. The 16S rRNA is the mitochondrial homologue of the prokaryotic 23S and eukaryotic nuclear 28S ribosomal RNAs. See also * Mitochondrial DNA * Humanin Humanin is a micropeptide encoded in the mitochondrial genome by the 16S ribosomal RNA gene, MT-RNR2. Its structure contains a three-turn α-helix, and no symmetry. In ''in vitro'' and animal models, it appears to have cytoprotective effects. ... References Ribosomal RNA Human mitochondrial genes {{genetics-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
12S RRNA
Mitochondrially encoded 12S ribosomal RNA (often abbreviated as 12S or 12S rRNA) is the SSU rRNA of the mitochondrial ribosome. In humans, 12S is encoded by the ''MT-RNR1'' gene and is 959 nucleotides long. MT-RNR1 is one of the 37 genes contained in animal mitochondria genomes. Their 2 rRNA, 22 tRNA and 13 mRNA genes are very useful in phylogenetic studies, in particular the 12S and 16S rRNAs. The 12S rRNA is the mitochondrial homologue of the prokaryotic 16S and eukaryotic nuclear 18S ribosomal RNAs. Mutations in the MT-RNR1 gene may be associated with hearing loss. The rRNA gene also encodes a peptide MOTS-c, also known as Mitochondrial-derived peptide MOTS-c or Mitochondrial open reading frame of the 12S rRNA-c. Structure The ''MT-RNR1'' gene is located on the p arm of the mitochondrial DNA at position 12 and it spans 953 base pairs. Function The ''MT-RNR1'' gene encodes for an rRNA responsible for regulating insulin sensitivity and metabolic homeostasis. The p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DNA Sequence
A nucleic acid sequence is a succession of bases within the nucleotides forming alleles within a DNA (using GACT) or RNA (GACU) molecule. This succession is denoted by a series of a set of five different letters that indicate the order of the nucleotides. By convention, sequences are usually presented from the 5' end to the 3' end. For DNA, with its double helix, there are two possible directions for the notated sequence; of these two, the sense strand is used. Because nucleic acids are normally linear (unbranched) polymers, specifying the sequence is equivalent to defining the covalent structure of the entire molecule. For this reason, the nucleic acid sequence is also termed the primary structure. The sequence represents genetic information. Biological deoxyribonucleic acid represents the information which directs the functions of an organism. Nucleic acids also have a secondary structure and tertiary structure. Primary structure is sometimes mistakenly referred to as "prim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intron
An intron is any nucleotide sequence within a gene that is not expressed or operative in the final RNA product. The word ''intron'' is derived from the term ''intragenic region'', i.e., a region inside a gene."The notion of the cistron .e., gene... must be replaced by that of a transcription unit containing regions which will be lost from the mature messenger – which I suggest we call introns (for intragenic regions) – alternating with regions which will be expressed – exons." (Gilbert 1978) The term ''intron'' refers to both the DNA sequence within a gene and the corresponding RNA sequence in RNA transcripts. The non-intron sequences that become joined by this RNA processing to form the mature RNA are called exons. Introns are found in the genes of most eukaryotes and many eukaryotic viruses, and they can be located in both protein-coding genes and genes that function as RNA ( noncoding genes). There are four main types of introns: tRNA introns, group I introns, group I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
β-fibrinogen
Fibrinogen beta chain, also known as FGB, is a gene found in humans and most other vertebrates with a similar system of blood coagulation. The protein encoded by this gene is the beta component of fibrinogen, a blood-borne glycoprotein composed of three pairs of nonidentical polypeptide chains. Following vascular injury, fibrinogen is cleaved by thrombin to form fibrin which is the most abundant component of blood clots. In addition, various cleavage products of fibrinogen and fibrin regulate cell adhesion and spreading, display vasoconstrictor and chemotactic activities, and are mitogens for several cell types. Mutations in this gene lead to several disorders, including afibrinogenemia, dysfibrinogenemia, hypodysfibrinogenemia and thrombotic tendency. Interactions Fibrinogen beta chain has been shown to interact with Lipoprotein(a). See also * Fibrin *Fibrinogen alpha chain *Fibrinogen gamma chain Fibrinogen gamma chain, also known as the fibrinogen gamma gene (FGG), is a h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NDNA
Nuclear DNA (nDNA), or nuclear deoxyribonucleic acid, is the DNA contained within each cell nucleus of a eukaryotic organism. It encodes for the majority of the genome in eukaryotes, with mitochondrial DNA and plastid DNA coding for the rest. It adheres to Mendelian inheritance, with information coming from two parents, one male and one female—rather than matrilineally (through the mother) as in mitochondrial DNA. Structure Nuclear DNA is a nucleic acid, a polymeric biomolecule or biopolymer, found in the nucleus of eukaryotic cells. Its structure is a double helix, with two strands wound around each other, a structure first described by Francis Crick and James D. Watson (1953) using data collected by Rosalind Franklin. Each strand is a long polymer chain of repeating nucleotides. Each nucleotide is composed of a five-carbon sugar, a phosphate group, and an organic base. Nucleotides are distinguished by their bases: purines, large bases that include adenine and guanine; and py ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Protein Subunit
In structural biology, a protein subunit is a polypeptide chain or single protein molecule that assembles (or "''coassembles''") with others to form a protein complex. Large assemblies of proteins such as viruses often use a small number of types of protein subunits as building blocks. A subunit is often named with a Greek or Roman letter, and the numbers of this type of subunit in a protein is indicated by a subscript. For example, ATP synthase has a type of subunit called α. Three of these are present in the ATP synthase molecule, leading to the designation α3. Larger groups of subunits can also be specified, like α3β3-hexamer and c-ring. Naturally occurring proteins that have a relatively small number of subunits are referred to as oligomeric.Quote: ''Oligomer molecule: A molecule of intermediate relative molecular mass, the structure of which essentially comprises a small plurality of units derived, actually or conceptually, from molecules of lower relative molecula ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
