Search results
Results from the WOW.Com Content Network
The example above is an example alloparalogy. Symparalogs are paralogs that evolved from gene duplication of paralogous genes in subsequent speciation events. From the example above, if the descendant with genes A1 and B underwent another speciation event where gene A1 duplicated, the new species would have genes B, A1a, and A1b.
The term "ortholog" was coined in 1970 by the molecular evolutionist Walter Fitch. [41] Homologous sequences are paralogous if they were created by a duplication event within the genome. For gene duplication events, if a gene in an organism is duplicated, the two copies are paralogous. They can shape the structure of whole genomes and thus ...
English: Top: An ancestral gene duplicates to produce two paralogs (histone H1.1 and 1.2).A speciation event produces orthologs in the two daughter species (human and chimpanzee).
The elements of H n (X) are called homology classes. Each homology class is an equivalence class over cycles and two cycles in the same homology class are said to be homologous. [6] A chain complex is said to be exact if the image of the (n+1)th map is always equal to the kernel of the nth map.
6469 20423 Ensembl ENSG00000164690 ENSMUSG00000002633 UniProt Q15465 Q62226 RefSeq (mRNA) NM_000193 NM_001310462 NM_009170 RefSeq (protein) NP_000184 NP_001297391 NP_033196 Location (UCSC) Chr 7: 155.8 – 155.81 Mb Chr 5: 28.66 – 28.67 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Sonic hedgehog protein (SHH) is encoded for by the SHH gene. The protein is named after the video ...
A homologue (also spelled as homolog) is a compound belonging to a homologous series. [1] Compounds within a homologous series typically have a fixed set of functional groups that gives them similar chemical and physical properties. (For example, the series of primary straight-chained alcohols has a hydroxyl at the end of the carbon chain ...
The connecting map takes a relative cycle, representing a homology class in (,), to its boundary (which is a cycle in A). [2] It follows that (,), where is a point in X, is the n-th reduced homology group of X.
Phosphatase and tensin homolog (PTEN) is a phosphatase in humans and is encoded by the PTEN gene. [6] Mutations of this gene are a step in the development of many cancers , specifically glioblastoma, lung cancer, breast cancer, and prostate cancer.