Video: ATP ntau npaum li cas yog Gibbs dawb zog?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Nyob rau hauv "tus qauv" tej yam kev mob (piv txwv li concentrations ntawm 1M rau tag nrho cov reactants tsuas yog dej uas yog coj ntawm nws tus yam ntxwv concentration ntawm 55M) lub Gibbs free zog ntawm ATP hydrolysis txawv ntawm -28 txog -34 kJ / mol (piv txwv li ≈12 kBT, BNID 101989) nyob ntawm qhov concentration ntawm cation Mg2+.
Hauv qhov no, ATP puas muaj ntau lub zog ntawm Gibbs dawb?
Lub oxidation ntawm qabzib thiab kev tsim tawm ntawm ATP nyob rau hauv tib neeg tshwm sim nyob rau hauv cia ntawm Gibbs pub dawb zog ntau ntau nyob rau hauv phosphate bonds ntawm ATP , uas tuaj yeem tso tawm thaum ATP yog hydrolyzed thiab nws pawg phosphate raug tshem tawm los tsim ADP hauv cov hlwb.
Tsis tas li ntawd, ATP cuam tshuam li cas rau lub zog dawb? Adenosine 5'-triphosphate ATP ) plays lub luag haujlwm tseem ceeb hauv cov txheej txheem no los ntawm kev ua lub khw ntawm dawb zog nyob rau hauv lub cell (Daim duab 2.31). Kev sib txuas ntawm phosphates hauv ATP yog lub npe hu ua high- zog bonds vim lawv hydrolysis yog nrog los ntawm ib tug kuj loj txo nyob rau hauv dawb zog.
Tom qab ntawd, ib tug kuj yuav nug, dab tsi yog qhov delta g ntawm ATP?
Hauv cov xwm txheej txheem ( ATP , ADP thiab Pi Cov concentrations yog sib npaug rau 1M, dej concentration yog sib npaug rau 55M) tus nqi ntawm ΔG yog nruab nrab ntawm -28 txog -34 kJ / mol. Qhov ntau ntawm ΔG tus nqi tshwm sim vim qhov tshuaj tiv thaiv no yog nyob ntawm qhov concentration ntawm Mg2+ cations, uas stabilize ATP molecule.
ATP zog npaum li cas?
Hydrolysis ntawm ib gram mole ntawm ATP tso tawm txog 470 kJ ntawm qhov muaj txiaj ntsig zog ; hydrolysis ntawm ib leeg ATP molecule, txog 10−19 J. "Txhua yam kev ua haujlwm biosynthesis ntawm tes, ntau ntawm nws cov txheej txheem thauj thiab ntau yam kev ua ub no xav tau zog . Zog txhais tau tias yog lub peev xwm ua haujlwm.
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