stem cells：干细胞

《stem cells：干细胞》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、EnzymesAllchemicalreactionsconvertreactantstoproducts.Ex.2HCl+MgMgCl2+H2Enzymesareaclassofprotein.Thejobofanenzymeistocatalyzeareaction(helpitgetstarted).Enzymeslowertheamountofenergyneededtogetthereactiongoing–activationenergy.ExamplesDNApolymerase–makesDNARennin–curdlesmilkproteinLipase–break

2、sdownfatsProtease–breaksdownproteinsUsuallyendwith“-ase”Howdoenzymeswork?Thematerialthatanenzymeworksoniscalledasubstrate.Enzymesworklikealockandkey–musthaverightenzymeforeachsubstrate.Howdoenzymeswork?Theactivesiteontheenzymeiswhatbindstothesubstrate.Whyenzymes?SpecificnessandReusingenzymesEnzy

3、meShapeTheshapeofeachproteinisdeterminedbythesequenceofaminoacidsusedtomakethatprotein.Justasforproteins,shapeisextremelyimportant.Ifproteins/enzymesdon’thavethecorrecttemperature,pH,orsaltconcentration,theywilllosetheirshapeordenatureandnotbeabletofunction.Denaturinghttp://www.lewport.wnyric.or

4、g/jwanamaker/animations/Enzyme%20activity.htmlTutorialactivityCompetitiveInhibitionInaprocesscalledcompetitiveinhibition,moleculesthatfittheactivesitecanpreventtheenzymefromworking.