Qhov sib txawv tseem ceeb ntawm G3P thiab 3-PGA yog G3P muaj aldehyde ua haujlwm pab pawg ntawm carbon-3 txoj haujlwm, thaum 3-PGA muaj cov carboxylic acid ua haujlwm ntawm cov pa roj carbon 3 txoj haujlwm.
G3P sawv cev rau glyceraldehyde 3-phosphate, thaum 3-PGA sawv cev rau 3-phosphoglyceric acid. Cov tebchaw no tseem ceeb heev hauv txoj hauv kev sib txawv ntawm cov kab mob nyob. G3P yog siv los ua ib qho nruab nrab hauv photosynthesis, tryptophan biosynthesis, thiab thiamine biosynthesis. Tsis tas li ntawd, 3-PGA muaj txiaj ntsig zoo li metabolic intermediate hauv ob qho tib si glycolysis thiab Calvin-Benson lub voj voog, tseem ceeb hauv amino acid synthesis ua tus precursor rau seine, thiab lwm yam.
G3P yog dab tsi?
G3P sawv cev rau glyceraldehyde 3-phosphate. Nws tseem muaj npe hu ua triose phosphate lossis 3-phosphoglyceraldehyde. Peb tuaj yeem sau nws li G3P, GA3P, GADP, GAP, TP, GALP, lossis PGAL. Peb tuaj yeem txheeb xyuas nws raws li cov metabolite uas twb muaj lawm ua ib qho nruab nrab hauv ntau txoj hauv kev ntawm cov kab mob nyob. Cov tshuaj formula ntawm no compound yog H(O)CCH(OH)CH2OPO32-Nws yog anion uas yog monophosphate ester ntawm glyceraldehyde.
Daim duab 01: Cov Qauv Tshuaj ntawm G3P
G3P yog qhov tseem ceeb ua tus nruab nrab hauv ob qho tib si glycolysis thiab gluconeogenesis. Cov tshuaj no tsim los ntawm peb lub ntsiab lus tseem ceeb: beta-D-fructose 1, 6-bisphosphate, dihydroxyacetone phosphate, thiab glyceraldehyde 3-phosphate. Cov tebchaw no muaj txiaj ntsig zoo li cov tshuaj reactants hauv cov tshuaj tiv thaiv rov qab.
Lub luag haujlwm tseem ceeb tshaj plaws ntawm G3P yog qhov nruab nrab hauv photosynthesis, tryptophan biosynthesis, thiab thiamine biosynthesis.
3-PGA yog dab tsi?
3-PGA sawv cev rau 3-phosphoglyceric acid. Nws yog conjugate acid ntawm phosphoglycerate. Nws yog ib qho tseem ceeb ntawm cov tshuaj biochemical uas tuaj yeem ua raws li cov metabolism hauv nruab nrab. Nws yog ib qho tseem ceeb hauv ob qho tib si glycolysis thiab Calvin-Benson voj voog. Feem ntau, cov anion ntawm cov tshuaj no hu ua PGA.
Daim duab 02: Cov Qauv Tshuaj ntawm 3-PGA
Thaum xav txog Calvin-Benson lub voj voog, 3-PGA feem ntau yog cov khoom lag luam ntawm kev sib tsoo (kev ua haujlwm ntawm tus kheej) ntawm qhov tsis ruaj khov 6-carbon intermediate metabolite uas tsim los ntawm CO2 fixation. Yog li ntawd, muaj ob qhov sib npaug ntawm 3-phosphoglycerate uas tsim ib qho CO2 molecule, uas yog tus nqi ruaj khov. Ntawm qhov tod tes, hauv glycolysis, qhov sib xyaw no muaj txiaj ntsig zoo li qhov nruab nrab uas ua raws li dephosphorylation lossis txo qis ntawm 1, 3-bisphosphoglycerate.
Ntxiv mus, 3-PGA yog qhov tseem ceeb hauv cov amino acid synthesis ua tus precursor rau seine. Qhov no muaj txiaj ntsig zoo hauv kev tsim cysteine thiab glycine ntawm homocysteine cycle. Peb tuaj yeem yooj yim cais 3-PGA los ntawm cov qauv los ntawm cov ntawv chromatography thiab kem chromatography. Tsis tas li ntawd, peb tuaj yeem txheeb xyuas tau yooj yim los ntawm ob qho tib si roj chromatography thiab kua chromatography ua ke nrog cov spectrometry loj.
Qhov txawv ntawm G3P thiab 3-PGA yog dab tsi?
G3P sawv cev rau glyceraldehyde 3-phosphate, thaum 3-PGA sawv cev rau 3-phosphoglyceric acid. Qhov sib txawv tseem ceeb ntawm G3P thiab 3-PGA yog G3P muaj aldehyde ua haujlwm pab pawg ntawm carbon-3 txoj haujlwm, thaum 3-PGA muaj cov carboxylic acid ua haujlwm ntawm cov pa roj carbon 3 txoj haujlwm.
Ntxiv mus, cov tebchaw no muaj lub luag haujlwm tseem ceeb sib txawv hauv txhua yam kabmob muaj sia. G3P yog siv los ua ib qho nruab nrab hauv photosynthesis, hauv tryptophan biosynthesis, thiab hauv thiamine biosynthesis, thaum 3-PGA muaj txiaj ntsig zoo li metabolic intermediate nyob rau hauv ob qho tib si glycolysis thiab Calvin-Benson voj voog, tseem ceeb hauv amino acid synthesis ua precursor rau seine, thiab lwm yam.
Cov lus hauv qab no qhia txog qhov sib txawv ntawm G3P thiab 3-PGA.
Summary – G3P vs 3-PGA
G3P sawv cev rau glyceraldehyde 3-phosphate, thaum 3-PGA sawv cev rau 3-phosphoglyceric acid. Qhov sib txawv tseem ceeb ntawm G3P thiab 3-PGA yog G3P muaj aldehyde ua haujlwm pab pawg ntawm carbon-3 txoj haujlwm, thaum 3-PGA muaj cov carboxylic acid ua haujlwm ntawm cov pa roj carbon 3 txoj haujlwm.
