… yog tsim los ntawm plaub pawg heme nyob ib puag ncig ib pawg globin, tsim cov qauv tetrahedral. … Heme yog tsim los ntawm a ringlike organic compoundhu ua porphyrin, uas muaj hlau atom txuas. Nws yog cov hlau atom uas thim rov qab khi oxygen thaum cov ntshav mus ntawm lub ntsws thiab cov ntaub so ntswg.
Him yog tsim li cas?
Heme synthesis pib hauv mitochondria nrog condensation ntawm succinyl-CoA nrog cov amino acid glycine, qhib los ntawm pyridoxal phosphate. ALA synthase yog tus nqi txwv enzyme ntawm heme synthesis. … Thaum kawg, hlau tau muab tso ua ke los tsim heme.
yog dab tsi thiab nws ua li cas?
Heme feem ntau pom muaj nyob hauv tib neeg thiab tsiaj cov ntshav, tab sis ntau plants muaj heme thiab. Ib tsob nroj uas muaj qhov tseem ceeb ntawm heme yog cov taum pauv, uas muaj leghemoglobin hauv nws cov hauv paus hniav. Vim li ntawd, Impossible Foods tau xaiv cov kua txiv hmab txiv ntoo (nrog rau cov poov xab) los ua nws cov kua txiv hmab txiv ntoo leghemoglobin, aka heme.
Hem muab rho tawm los ntawm cov nroj tsuag li cas?
Classically, tag nrho cov uas tsis yog-covalently khi heme yog muab rho tawm los ntawm cog cov qauv nrog acidic acetone tom qab tshem tawm cov xim nrog cov ntsiab lus thiab nruab nrab acetone. Kev ua haujlwm yav dhau los tau hais tias cov heme dawb tuaj yeem xaiv tau muab rho tawm mus rau hauv acetone.
Hmoob tuaj yeem los ntawm cov nroj tsuag?
Leghemoglobin yog cov protein uas pom muaj nyob rau hauv cov nroj tsuag uas nqa heme, ib qho khoom muaj hlau uas tseem ceeb rau lub neej. Heme muaj nyob rau hauv txhua yam nyob - ob qho tib si nroj tsuag thiab tsiaj txhu. (Heme hauv tsiaj yog nqa los ntawm "hemoglobin" thiab "myoglobin" ntawm lwm cov proteins.)
