EnzymesAllchemicalreactionsconvertreactantstoproducts.Ex.2HCl+MgMgCl2+H2Enzymesareaclassofprotein.Thejobofanenzymeistocatalyzeareaction(helpitgetstarted).第一页,共十六页。第二页,共十六页。第三页,共十六页。第四页,共十六页。第五页,共十六页。第六页,共十六页。Enzymeslowertheamountofenergyneededtogetthereactiongoing–activationenergy.第七页,共十六页。ExamplesDNApolymerase–makesDNARennin–curdlesmilkproteinLipase–breaksdownfatsProtease–breaksdownproteinsUsuallyendwith“-ase〞第八页,共十六页。Howdoenzymeswork?Thematerialthatanenzymeworksoniscalledasubstrate.Enzymesworklikealockandkey–musthaverightenzymeforeachsubstrate.第九页,共十六页。Howdoenzymeswork?Theactivesiteontheenzymeiswhatbindstothesubstrate.Whyenzymes?SpecificnessandReusingenzymes第十页,共十六页。EnzymeShapeTheshapeofeachproteinisdeterminedbythesequenceofaminoacidsusedtomakethatprotein.Justasforproteins,shapeisextremelyimportant.Ifproteins/enzymesdon’thavethecorrecttemperature,pH,orsaltconcentration,theywilllosetheirshapeordenatureandnotbeabletofunction.Denaturing第十一页,共十六页。第十二页,共十六页。第十三页,共十六页。://lewport.wnyric.org/jwanamaker/animations/Enzyme%20activity.htmlTutorialactivity第十四页,共十六页。CompetitiveInhibitionInaprocesscalledcompetitiveinhibition,moleculesthatfittheactivesitecanpreventtheenzymefromworking.第十五页,共十六页。内容总结Enzymes。Usuallyendwith“-ase〞。://lewport.wnyric.org/jwanamaker/animations/Enzyme%20activity.html。CompetitiveInhibition第十六页,共十六页。