06-20-2006, 08:00 AM
C
heme is oxidized ,with the heme ring being opened by th endoplasmic reticulum enzyme,heme oxygenase.the oxidation steps requires heme as a substare,and any hemin(Fe 3+) is reduced to heme prior to oxidation by heme oxygenase.The oxidation occurs on a specific carbon producing the linear tetrapyrole biliverdin ,ferric ion(Fe3+). n CO.this is the only reaction in the body known to produce CO.Most of the CO is excreted thru lungs ,with the result that the Co content of expired air is a direct measure of the activity of heme oxidase in an individual >Biliverdin reductase(choice A) catalyzes the convertion of biliverdin to bilirubin.
Coproporphyrinogen oxidase (choiceB) protoporphyrinogen oxidase(choice D) n uroporphyrinogen decarboxylase (choice E) r all involved in the synthesis of heme n donot produce CO in the course of cartalyzing their reactions.
heme is oxidized ,with the heme ring being opened by th endoplasmic reticulum enzyme,heme oxygenase.the oxidation steps requires heme as a substare,and any hemin(Fe 3+) is reduced to heme prior to oxidation by heme oxygenase.The oxidation occurs on a specific carbon producing the linear tetrapyrole biliverdin ,ferric ion(Fe3+). n CO.this is the only reaction in the body known to produce CO.Most of the CO is excreted thru lungs ,with the result that the Co content of expired air is a direct measure of the activity of heme oxidase in an individual >Biliverdin reductase(choice A) catalyzes the convertion of biliverdin to bilirubin.
Coproporphyrinogen oxidase (choiceB) protoporphyrinogen oxidase(choice D) n uroporphyrinogen decarboxylase (choice E) r all involved in the synthesis of heme n donot produce CO in the course of cartalyzing their reactions.