Cov cytochrome proteins hauv ETC muaj cov pab pawg heme uas koom nrog kev thauj khoom hluav taws xob. … Txawm li cas los xij, tsis zoo li cov pab pawg heme nyob rau hauv cov pa oxygen-binding proteins, lub heme hlau ntawm cytochromes yog reversibly txo thiab oxidized thaum lub sij hawm ETC kev ua.
Dab tsi yog qhov txo qis hauv cov saw hlau thauj hluav taws xob?
Electron thauj yog ib qho kev cuam tshuam redox uas zoo ib yam li kev sib tw sib tw lossis lub thoob hauv lub tshuab hluav taws xob hauv cov khoom siv hluav taws xob tau dhau los ntawm ib feem mus rau lwm qhov, mus rau qhov kawg ntawm cov saw hlau uas cov electrons txo molecular oxygen, tsim dej.
Puas yog cov saw hlau thauj hluav taws xob oxidized lossis txo?
Thaum electrons tuaj txog ntawm complex IV, lawv raug xa mus rau ib lub molecule ntawm oxygen. Txij li thaum cov pa oxygen tau txais electrons, nws raug txo kom dej. Thaum cov oxidation thiab txo qiskev tshwm sim tshwm sim, lwm qhov kev sib txuas tshwm sim tshwm sim hauv cov saw hlau thauj hluav taws xob.
Yuav siv hlau li cas hauv kev thauj khoom hluav taws xob?
Cov hlau atoms tam sim no nyob rau hauv pawg Fe-S tuaj yeem tshwm sim xws li ferric lossis ferrous hlau thiab lub voj voog ntawm lub xeev redox, tso cai rau Fe-S pawg koom nrog cov tshuaj tiv thaiv redox. … Fe-S pawg kho kom haum electron hloov pauv nyob rau hauv thiab nruab nrab ntawm cov pa ua pa ntawm cov saw hlau thauj electron [72, 73].
Dab tsi yog oxidized thiab txo hauv electron thauj saw?
ReactionsKev koom nrog kev hloov hluav taws xob yog hu ua oxidation-txo cov tshuaj tiv thaiv (lossis redox tshuaj tiv thaiv). Tej zaum koj yuav tau kawm nyob rau hauv chemistry hais tias ib tug redox cov tshuaj tiv thaiv yog thaum ib molecule poob electrons thiab yog oxidized, thaum lwm molecule tau txais electrons (tus uas poob los ntawm thawj molecule) thiab txo.
