Qhov sib txawv tseem ceeb ntawm D thiab L qabzib yog tias hauv D-glucose, peb pawg hydroxyl thiab ib pawg hydrogen nyob rau sab xis thaum, hauv L-glucose, peb pawg hydroxyl thiab ib pawg hydrogen nyob hauv. sab laug.
Tsab ntawv "D" thiab "L" qhia hauv cov npe D-glucose thiab L-glucose yog siv los paub qhov txawv ntawm cov qauv hauv cov piam thaj molecule. Ob daim ntawv no yog hu ua enantiomers vim lawv cov qauv molecular yog daim iav duab ntawm ib leeg. Yog li, qhov sib txawv tseem ceeb ntawm D thiab L piam thaj nyob hauv lawv cov qauv. Peb tuaj yeem piav qhia qhov sib txawv ntawm lawv cov duab siv Fisher projection qauv; Nws yog ib txoj hauv kev los kos cov organic molecules.
D Glucose yog dab tsi?
D-glucose yog enantiomer ntawm L-glucose thiab peb hu nws dextrose. Tsis zoo li L-glucose, nws tshwm sim dav hauv qhov xwm txheej. Ntxiv mus, qhov sib xyaw no yog qhov tseem ceeb tshaj plaws aldohexose hauv cov kab mob muaj sia. Piv txwv li, nws yog ib qho tseem ceeb raws li lub zog ntawm cov kab mob nyob hauv feem ntau ntawm cov kab mob mus rau tib neeg.
Daim duab 01: D thiab L Glucose Structures
Cov kab mob no tau txais lub zog los ntawm qhov sib xyaw no los ntawm aerobic lossis anaerobic ua pa lossis fermentation.
L Glucose yog dab tsi?
L-glucose yog cov organic compound thiab nws lub npe IUPAC yog (2S, 3R, 4S, 5S)-2, 3, 4, 5, 6-pentahydroxyhexanal. Nws cov mis molecular thiab molecular luj yog C6H12O6 thiab 180.16 gmol -1 raws. Qhov sib xyaw no tshwm sim hauv cov txiv hmab txiv ntoo thiab lwm qhov chaw ntawm cov nroj tsuag hauv nws lub xeev dawb. Txawm li cas los xij, nws tsis nyob hauv cov kab mob uas muaj sia nyob siab dua.
Tab sis, peb tuaj yeem tsim nws hauv chav kuaj. Qhov sib xyaw no muaj cov saj zoo sib xws uas sib npaug rau saj ntawm D-glucose. Cov kab mob muaj sia tsis tuaj yeem haus nws ua lawv lub zog vim nws tsis yog phosphorylated los ntawm hexokinase, uas yog thawj enzyme hauv txoj kev glycolysis.
Dab tsi yog qhov txawv ntawm D thiab L Glucose?
D-glucose yog enantiomer ntawm L-glucose thiab peb hu nws dextrose. L-glucose yog cov organic compound thiab nws lub npe IUPAC yog (2S, 3R, 4S, 5S)-2, 3, 4, 5, 6-pentahydroxyhexanal. Hauv D-glucose, peb pawg hydroxyl thiab ib pawg hydrogen txuas mus rau sab xis thaum, hauv L-glucose, peb pawg hydroxyl thiab ib pawg hydrogen txuas rau sab laug.
Tsis tas li ntawd, D-glucose tuaj yeem muaj nyob rau hauv ob qho tib si linear daim ntawv thiab daim ntawv cyclic, tab sis L-glucose muaj nyob rau hauv qhov sib npaug ntawm α-L-glucopyranose thiab β-L-glucopyranose. D-glucose yog lub zog tseem ceeb hauv feem ntau ntawm cov kab mob muaj sia. Txawm li cas los xij, L-Glucose yog cov khoom qab zib uas muaj calorie tsawg uas yog cov lus qhia zoo rau cov neeg mob ntshav qab zib.
Summary – D vs L Glucose
Tsab ntawv "D" thiab "L" qhia hauv cov npe D-glucose thiab L-glucose yog qhov muaj txiaj ntsig kom paub qhov txawv ntawm cov qauv hauv cov piam thaj molecule. Qhov sib txawv ntawm D thiab L qabzib yog tias hauv D-glucose, peb pawg hydroxyl thiab ib pawg hydrogen nyob rau sab xis whereas, hauv L-glucose, peb pawg hydroxyl thiab ib pawg hydrogen nyob rau sab laug.
