| 词汇 | actin |
| 释义 | actin noun[ U ] anatomy specializeduk /ˈæk.tɪn/ us /ˈæk.tɪn/ a protein found in living cells that is involved in cell movement: The two proteins that allow muscles to contract are myosin and actin, which operate together. actin filamentsContraction is accomplished via interactions between the actin filaments and myosin. T cells are unable to reorganize their actin cytoskeleton. They spread from cell to cell by a process involving actin polymerization. The mechanism by which actin filaments modulate embryo development is poorly understood. A network of actin cables extended through the cytoplasm. Substances & structures in the body abductor accessorius ACL adductor adenoid funiculus fusiform glomerular glomerulus GnRH navicular neuroendocrine neurohormonal neurohormone nociceptive tendinous tendinum tendo tensor Th You can also find related words, phrases, and synonyms in the topics: Cells Examples of actinactin Synaptic vesicles are stockpiled near the presynaptic membrane, and may be organized by the actin cytoskeleton. This effect was specific to actin, and was not observed with other cytoskeleton proteins such as tubulin. Involvement of calcium signaling and the actin cytoskeleton in the membrane block to polyspermy in mouse oocytes. The top row of figures (a to d) illustrates the proposed changes in the organisation of actin and myosin. This pool of actin is readily available for the rapid polymerisation that follows egg activation. Many of these cell-surface receptors activate signaling pathways that cause reorganization of the actin cytoskeleton. The myosin head then releases the actin thin filament and returns to its original confirmation ready to interact with another region of the actin filament. Integrins include domains that bind divalent cations that are important for receptor-ligand interactions linking extracellular molecules, the actin cytoskeleton and cytoplasmic signaling proteins. The number of overlap zones is determined by the number of points at which actin filaments emanate from the plasma membrane. These actin filaments were distributed intensively between the trophectodermal cells, and formed locomotion patterns. The amount of actin filaments was prominent at hatching embryos compared with other developmental stages of embryos. The cytochalasins are fungal products that prevent actin from polymerising by binding to the plus end of the filaments. The leading edge of a moving cell contains actin filaments that are continually polymerising. Either round or mixed phenotypes were also visible, with diffuse actin label. The locations of the binding sites for actin, -dystroglycan, syntrophins and dystrobrevin are indicated. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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