Puas yog txoj kev pentose phosphate xav tau oxygen?
Puas yog txoj kev pentose phosphate xav tau oxygen?

Video: Puas yog txoj kev pentose phosphate xav tau oxygen?

Video: Puas yog txoj kev pentose phosphate xav tau oxygen?
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Anonim

Lub PPP ua tsis haus lossis tsim ATP thiab ua tsis yog xav tau molecular cov pa . Nyob rau thaum ntxov ' oxidative theem' ntawm PPP, thaum lub sij hawm uas thawj cov pa roj carbon monoxide lub cev pob txha ploj li carbon dioxide, nicotinamide adenine dinucleotide. phosphate (NADP+) hloov dua siab tshiab rau NADPH.

Yog li ntawd, dab tsi yog qhov point ntawm txoj kev pentose phosphate?

Cov pentose phosphate txoj kev feem ntau yog catabolic thiab ua lwm yam qabzib oxidizing txoj kev rau tiam ntawm NADPH uas yuav tsum tau rau txo cov biosynthetic tshuaj xws li cov cholesterol biosynthesis, bile acid synthesis, steroid hormone biosynthesis, thiab fatty acid synthesis.

Ib yam li ntawd, vim li cas oxidative pentose phosphate txoj kev hu ua txoj kev shunt? Nws yog hu ua tus pentose phosphate kaw vim txoj kev tso cai rau carbon atoms los ntawm qabzib 6- phosphate mus taug kev luv luv (a shunt ) ua ntej lawv mus rau hauv Embden-Meyerhof (glycolytic) txoj kev . Cov pentose phosphate txoj kev yog lwm txoj hauv kev rau glycolysis.

Yog li ntawd, puas pentose phosphate txoj kev tshwm sim hauv cov leeg?

Txij li thaum txo hwj chim hauv daim ntawv ntawm NADPH yog xav tau rau cov biosynthetic txoj kev , cov pentose phosphate txoj kev yog nquag nquag hauv cov ntaub so ntswg. Cov ntaub so ntswg uas tsis tshua muaj zog hauv NADPH-dependent reductive biosyntheses feem ntau pom tsawg dua txoj kev kev ua si, np. cev pob txha cov leeg.

Dab tsi yog qhov pib compound rau pentose phosphate txoj kev PPP)?

Cov pentose phosphate txoj kev pib nrog oxidation ntawm cov piam thaj-derived carbon atom rau CO2 thiab concomitantly generates NADPH. Lub sijhawm rov tsim dua ntawm Calvin lub voj voog hloov C6 thiab C3 molecules rov qab mus rau hauv lub pib khoom - C5 Molecular ribulose 1, 5-bisphosphate.

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