cov qauv tshuaj hu ua heme pawg. Heme yog tsim los ntawm lub nplhaib zoo li cov organic compound hu ua porphyrin, uas ib lub atom hlau txuas. Nws yog cov hlau atom uas thim rov qab khi oxygen thaum cov ntshav mus ntawm lub ntsws thiab cov ntaub so ntswg.
Hmoob pab pawg yog dab tsi?
Heme yog ib pawg tseem ceeb prosthetic rau hemoproteins koom nrog ntau cov txheej txheem plawv, suav nrog kev thauj cov pa oxygen (hemoglobin), oxygen cia (myoglobin), oxygen metabolism (oxidases), antioxidation (peroxidases, catalases), thiab electron thauj (cytochromes).
4 pawg heme yog dab tsi?
Lub hemoglobin molecule yog tsim los ntawm plaub polypeptide chains (Alpha 1, Beta 1, Alpha 2, Beta 2), noncovalently khi rau ib leeg. Muaj plaub heme-hlau complexes. Txhua lub saw tuav ib pawg heme uas muaj ib qho Fe++ atom. Cov heme-hlau complexes yog xim liab vim lawv muab hemoglobin nws cov xim liab.
Dab tsi yog qhov ua haujlwm ntawm pawg heme hauv hemoglobin?
Ib qho tseem ceeb tshaj plaws ntawm cov ntshav yog nqa O 2 mus rau txhua qhov chaw ntawm lub cev ntawm cov protein hemoglobin. Qhov kev thauj cov pa oxygen no ua tiav los ntawm pawg heme (ib feem ntawm hemoglobin protein), uas yog cov hlau sib xyaw nrog hlau ua lub hauv paus hlau atom, uas tuaj yeem khi lossis tso tawm cov pa oxygen
Pab pawg heme txuas nrog hemoglobin li cas?
Lub npe hemoglobin yog muab los ntawm lo lus heme thiab globin, qhia txog qhov tseeb tias txhua lub subunit ntawm hemoglobin yog globular protein nrog ib pawg heme embedded. Txhua pawg heme muaj ib lub atom hlau, uas tuaj yeem khi ib qho pa molecule los ntawm ion-induced dipole rog
