In glycolysis, phosphoenolpyruvate (PEP) hloov mus rau pyruvate los ntawm pyruvate kinase. Cov tshuaj tiv thaiv no muaj zog exergonic thiab irreversible; Hauv gluconeogenesis, nws yuav siv ob lub enzymes, pyruvate carboxylase thiab PEP carboxykinase, txhawm rau ua kom rov qab hloov pauv ntawm pyruvate rau PEP.
Dab tsi hloov PEP rau hauv pyruvate?
Nyob rau hauv txoj kev canonical glycolysis, cov kauj ruam kawg yog catalyzed los ntawm PYK, uas irreversibly converts PEP thiab ADP rau pyruvate thiab ATP. PPDK muaj nyob rau hauv cov nroj tsuag thiab ntau yam kab mob, catalyzing reversible conversion ntawm PEP, AMP thiab PPi rau pyruvate, ATP thiab Pi.
PEP puas txo qis rau pyruvate?
Kev hloov pauv ntawm PEP rau pyruvate-feem ntau suav tias yog kauj ruam kawg ntawm glycolysis-yog cov kauj ruam uas lub zog glycolytic tau sau, hauv daim ntawv ntawm ATP (sib npaug).
Kev hloov pauv ntawm pyruvic acid yog dab tsi?
Daim duab: Pyruvic acid: Pyruvic acid tuaj yeem tsim los ntawm cov piam thaj los ntawm glycolysis, hloov rov qab mus rau carbohydrates (xws li qabzib) ntawm gluconeogenesis, lossis rau fatty acids los ntawm acetyl-CoA. Nws tseem tuaj yeem siv los tsim cov amino acid alanine thiab hloov mus rau hauv ethanol.
Dab tsi enzyme catalyzes hloov pauv ntawm phosphoenolpyruvate PEP rau pyruvate?
Pyruvate kinase yog ib qho enzyme uas catalyzes hloov pauv ntawm phosphoenolpyruvate thiab ADP rau pyruvate thiab ATP hauvglycolysis thiab ua lub luag haujlwm hauv kev tswj cov cell metabolism.
