翻訳と辞書 Words near each other ・ Biomics ・ Biomimetic antifouling coating ・ Biomimetic architecture ・ Biomimetic material ・ Biomimetic synthesis ・ Biomimetics ・ Biomin ・ Biomineralising polychaetes ・ Biomineralization ・ Biomining ・ BioMOBY ・ Biomodeling ・ BioModels Database ・ Biomolecular complex ・ Biomolecular engineering ・ Biomolecular gradient ・ Biomolecular Object Network Databank ・ Biomolecular structure ・ Biomolecule ・ Biomolecule stretching database ・ Biomonitoring ・ Biomorph ・ Biomorphism ・ BioMotiv ・ Biomotor Unitron ・ Biomphalaria ・ Biomphalaria alexandrina ・ Biomphalaria andecola ・ Biomphalaria angulosa ・ Biomphalaria barthi Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Biomolecular gradient ： ウィキペディア英語版 Biomolecular gradient A Biomolecular Gradient is established by a difference in the concentration of molecules in a biological system such as individual cells, groups of cells, or an entire organism. A biomolecular gradient can exist intracellularly (within a cell) or extracellularly (between groups of cells). The purposes of such gradients in biological systems vary, but include chemotaxis and functions in development. These types of gradients play a role in many different types of signaling as well as recently being implicated in cancer metastasis. == Development == Cells themselves can create biomolecular gradients by releasing signaling molecules that diffuse outwardly. These gradients are critical for cellular identity and cell relocation. Similarly, the gradients produced by cells may influence cellular fate by their temporal and spatial characteristics. In certain organisms, the choice of cell fate can be determined by a gradient, a binary choice, or through a relay of molecules released by a cell.〔 If cell fate is binary, the identity of the cell is influenced by the presence or absence of a signaling molecule; consequently, these signals can also induce cell fate acting in a relay.〔 The relay functions by the source cell releasing a signaling molecule into the environment. Adjacent cells possessing similar cell identities respond to these signals and can release different signaling molecules to cells in their surrounding area, promoting additional new cell fates. This process continues to all cells in the developing organism. In contrast, a signal can act in a gradient, which induces a specific cell fate as a function of the concentration of the molecule in the gradient. These types of molecules are known as morphogens. An example of this phenomenon is observed in the neural tube with varying concentrations of the Sonic Hedgehog (Shh) protein.〔 Shh is characterized as a morphogen and possesses spatial and temporal characteristics that make it well suited for study. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Biomolecular gradient」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.