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1 天前 · Insulin is a peptide hormone containing two chains cross-linked by disulfide bridges. Insulin ( / ˈɪn.sjʊ.lɪn /, [5] [6] from Latin insula, 'island') is a peptide hormone produced by beta cells of the pancreatic islets encoded in humans by the insulin ( INS) gene. It is the main anabolic hormone of the body. [7] .
1 天前 · In a DNA double helix, each type of nucleobase on one strand bonds with just one type of nucleobase on the other strand. This is called complementary base pairing.Purines form hydrogen bonds to pyrimidines, with adenine bonding only to thymine in two hydrogen bonds, and cytosine bonding only to guanine in three hydrogen bonds. . This arrangement of two nucleotides binding together across the ...
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6 天前 · References. Further reading. External links. Human evolution. The hominoids are descendants of a common ancestor. Human evolution is the evolutionary process within the history of primates that led to the emergence of Homo sapiens as a distinct species of the hominid family that includes all the great apes. [1] .
3 天前 · Biology is the scientific study of life.[1][2][3] It is a natural science with a broad scope but has several unifying themes that tie it together as a single, coherent field.[1][2][3] For instance, all organisms are made up of cells that process hereditary information encoded in genes, which can be transmitted to future generations. Another ...
2024年5月20日 · Casein kinase I isoform delta also known as CKI-delta or CK1δ is an enzyme that in humans is encoded by the gene CSNK1D, which is located on chromosome 17 (17q25.3).It is a member of the CK1 (formerly named casein kinase 1) family of serine/threonine specific eukaryotic protein kinases encompassing seven distinct isoforms (CK1α, γ1-3, δ, ε) as well as various post-transcriptionally ...
2 天前 · Catenin beta-1, also known as β-catenin ( beta -catenin), is a protein that in humans is encoded by the CTNNB1 gene . β-Catenin is a dual function protein, involved in regulation and coordination of cell–cell adhesion and gene transcription. In humans, the CTNNB1 protein is encoded by the CTNNB1 gene. [5] [6] In Drosophila, the homologous ...
4 天前 · The 5-HT 2A receptor is a cell surface receptor, [5] but has several intracellular locations. [6] Like all 5-HT 2 receptors, the 5-HT 2A receptor is G q /G 11 -protein coupled. This is the main excitatory receptor subtype among the GPCRs for serotonin, although 5-HT 2A may also have an inhibitory effect [7] on certain areas such as the visual ...
