Qhov sib txawv tseem ceeb ntawm DHAP thiab G3P yog tias dihydroxyacetone phosphate (DHAP) yog peb-carbon qab zib koom nrog hauv triglycerides synthesis, thaum glyceraldehydes 3 phosphate (G3P) yog peb-carbon qab zib uas yog nruab nrab ntawm glycolytic. txoj kev.
Monosaccharides yog cov suab thaj uas muaj li 3 txog 8 carbons atoms. Lawv yog cov suab thaj yooj yim uas tsis tuaj yeem hydrolyzed rau hauv cov suab thaj me thiab muaj cov qauv dav dav ntawm CnH2nOnRaws li lawv pab pawg ua haujlwm, lawv yog ob hom aldoses (muaj aldehydic pawg) thiab ketoses (muaj pawg ketonic). Tsis tas li ntawd, raws li tus naj npawb ntawm cov pa roj carbon atoms, lawv tau muab faib ua trioses (3 carbon atoms), tetroses (4 carbon atoms), pentoses (5 carbon atoms) thiab hexoses (6 carbon atoms). DHAP thiab G3P yog cov suab thaj uas muaj peb carbon atoms.
DHAP yog dab tsi?
Dihydroxyacetone phosphate (DHAP) yog peb-carbon qab zib uas yog ib qho precursor rau triglycerides synthesis. Nws tseem hu ua glycerine phosphate hauv cov ntawv qub. DHAP yog phosphate ester ntawm dihydroxyacetone. Nws kuj muaj ib daim ntawv anionic nrog cov tshuaj formula HOCH2C(O)CH2OPO3 2-. Cov anion no koom nrog ntau txoj hauv kev metabolic, suav nrog Calvin lub voj voog hauv cov nroj tsuag thiab cov tshuaj tiv thaiv glycolysis. Hauv Calvin lub voj voog, DHAP yog ib qho ntawm cov khoom lag luam ntawm kev txo qis ntawm 1-3 bisphosphoglycerate los ntawm NADPH. DHAP feem ntau yog siv rau kev tsim cov sedoheptulose1, 7 bisphosphate thiab fructose 1, 6 bisphosphate. Ob lub molecules no yog siv los hloov kho ribulose 5 phosphate, uas yog qhov tseem ceeb carbohydrate molecule ntawm Calvin cycle.
Figure 01: DHAP
Hauv glycolysis, nws yog ib qho ntawm ob yam khoom uas tshwm sim los ntawm kev tawg ntawm fructose 1, 6 bisphosphate nrog rau glyceraldehyde 3 phosphate. Nws hloov mus sai sai rau glyceraldehydes 3 phosphate los ntawm kev ua ntawm triosephosphate isomerase enzyme. Glyceraldehyde 3 phosphate yog ib qho tseem ceeb hauv nruab nrab ntawm glycolysis uas ua rau cellular ATP. Tsis tas li ntawd, kev hloov pauv ntawm DHAP rau L-glycerol 3 phosphate muab cov hlwb adipose nrog cov neeg ua ntej (activated glycerol qaum) lawv xav tau los ua ke tshiab triglycerides. DHAP kuj muaj lub luag haujlwm hauv cov txheej txheem lipid biosynthesis hauv cov kab mob protozoan; Leishmania mexicana. Tsis tas li ntawd, DHAP yog ib qho precursor rau 2-oxopropanol (pyruvaldehyde), uas yog ib tug flavoring agent.
G3P yog dab tsi?
Glyceraldehydes 3 phosphate (G3P) yog peb-carbon qab zib uas yog qhov nruab nrab ntawm txoj kev glycolysis. Nws yog monophosphate ester ntawm glyceraldehydes. Nws kuj muaj lub xeev anion nrog cov tshuaj formula ntawm H(O)CCH(OH)CH2OPO32- G3P yog qhov nruab nrab metabolite uas tshwm sim hauv ob peb lub hauv paus metabolic txoj hauv kev ntawm txhua yam kab mob. Nws yog ib qho nruab nrab hauv ob qho tib si glycolysis thiab gluconeogenesis.
Daim duab 02: G3P
G3P kuj yog ib qho tseem ceeb nruab nrab ntawm photosynthesis. Tsis tas li ntawd, G3P tshwm sim los ntawm cov khoom lag luam hauv biosynthesis ntawm tryptophan. Tryptophan yog ib qho tseem ceeb amino acid uas tsis tuaj yeem tsim los ntawm tib neeg lub cev. Ntxiv mus, glyceraldehydes 3 phosphate yog ib qho tseem ceeb reactant molecule hauv biosynthesis ntawm thiamine (vitamin B1). Thiamine yog lwm yam khoom uas tsis tuaj yeem tsim los ntawm tib neeg lub cev.
DHAP thiab G3P yog dab tsi?
- DHAP thiab G3P yog peb-carbon qab zib.
- YLawv yog monosaccharides.
- Cov molecules yog isomers.
- Lawv muaj tib lub qauv molecular.
- Ob leeg yog tsim los ntawm kev tawg ntawm fructose 1, 6 bisphosphate.
- Cov molecules no koom nrog hauv txoj hauv kev metabolic.
- Ob lub molecules tuaj yeem nyob hauv lub xeev anionic.
- Lawv muaj phosphate pawg hauv cov qauv.
Qhov txawv ntawm DHAP thiab G3P yog dab tsi?
DHAP yog peb-carbon qab zib koom nrog hauv triglycerides synthesis thaum G3P yog peb-carbon qab zib uas yog qhov nruab nrab ntawm glycolysis txoj hauv kev. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm DHAP thiab G3P. Tsis tas li ntawd, DHAP muaj pawg ketonic ua pab pawg ua haujlwm, thaum G3P muaj pawg aldehydic ua pawg ua haujlwm.
Cov ntawv qhia hauv qab no nthuav tawm qhov sib txawv ntawm DHAP thiab G3P hauv daim ntawv tabular rau ib sab ntawm kev sib piv.
Summary – DHAP vs G3P
DHAP thiab G3P yog cov suab thaj uas muaj peb cov pa roj carbon atom. Txij li thaum lawv cov mis molecular yog tib yam, lawv yog isomers ntawm ib leeg. DHAP yog peb-carbon monosaccharide koom nrog hauv triglycerides synthesis thaum G3P yog peb-carbon monosaccharide uas yog qhov nruab nrab ntawm txoj kev glycolysis. Yog li, qhov no yog qhov txawv ntawm DHAP thiab G3P.
