See corticotropin.參閱corti-cotropin。...[繼續(xù)閱讀]

    A protein that is a major constituentof muscle and is heavily involved with theprocess of muscle contraction. It is alsofound in the microfilaments (part of theCYTOSKELETON)present in almost alleukaryote cells,where it accounts for 1-5% of the total prote...[繼續(xù)閱讀]

    Any of a number ofproteins that bind to ACTIN and modify itsproperties. Examples are dystrophin,filamin,caldesmon,and the myosins.任何可以結合肌動蛋白并且修飾其特性的一系列蛋白質(zhì)。如,肌營養(yǎng)不良蛋白、絲蛋白、鈣調(diào)蛋白和肌球蛋白。...[繼續(xù)閱讀]

    Agroup of bacteria characterized by a myceli-al fungus-like growth habit and belongingto the phylum Actinobacteria. They are nu-merous in the topsoil and are important in soilfertility. Some may cause infections in animalsand humans. Most of the antibioti...[繼續(xù)閱讀]

    Any of a number of antibiot-ics produced by certain bacteria. The mainone ,actinom ycin D (or dactinom ycin),canbind between neighbouring base pairs inDNA,preventing RNA synthesis. It is usedin the treatment of some cancers.放線菌產(chǎn)生的一系列抗生素。主要如放線菌素D(或稱更生霉素...[繼續(xù)閱讀]

    The transitory change inelectrical potential that occurs across themembrane of a nerve or muscle fiber duringthe passage of a nervous impulse. The de-gree of change is independent of thestrength of the impulse;it either occurs ordoes not. In the absence o...[繼續(xù)閱讀]

    spectrum A graph showing theeffect of different wavelengths of radiation,usually light,on a given process. It is oftensimilar to the ABSORPTION SPECTRUMof the substance that absorbs the radiationand can therefore be helpful in identifyingthat substance. F...[繼續(xù)閱讀]

    The partially bondedsystem of atoms in the transition state of achemical reaction.一種化學反應中的過渡狀態(tài)下原子局部結合的體系。...[繼續(xù)閱讀]

    Symbol: Ea The mini-mum energy a particle,molecule,etc. ,mustacquire before it can react; i. e. the energyrequired to initiate a reaction regardless ofwhether the reaction is exothermic or endo-thermic. Activation energy corresponds toan energy barrier th...[繼續(xù)閱讀]

    The region of an ENZYMEmolecule that combines with and acts onthe substrate. It consists of catalytic aminoacids arranged in a configuration specific toa particular substrate or type of substrate.The ones that are in direct combination arethe contact amin...[繼續(xù)閱讀]