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11 Nov 2019
Identify the true statements regarding the heme group of myoglobin and hemoglobin A heme group contains four pyrrole rings, which are linked via methene (methine) â¡ â¡ bridges The heme group is conjugated. The cooperativity of oxygen binding in hemoglobin arises from electronic interactions between heme groups. Hemoglobin contains four heme groups. The globin chains of myoglobin and hemoglobin prevent the oxidation of Fe2+ to Fe â¡ which irreversibly binds oxygen. The T state of hemoglobin has lower affinity for O2 than the R state because the Fe-Nporphyrin bonds are longer. The iron in the heme group anform six bonds: The fifth is with an imidazole ring of a histidine and the sixth is with oxygen.
Identify the true statements regarding the heme group of myoglobin and hemoglobin A heme group contains four pyrrole rings, which are linked via methene (methine) â¡ â¡ bridges The heme group is conjugated. The cooperativity of oxygen binding in hemoglobin arises from electronic interactions between heme groups. Hemoglobin contains four heme groups. The globin chains of myoglobin and hemoglobin prevent the oxidation of Fe2+ to Fe â¡ which irreversibly binds oxygen. The T state of hemoglobin has lower affinity for O2 than the R state because the Fe-Nporphyrin bonds are longer. The iron in the heme group anform six bonds: The fifth is with an imidazole ring of a histidine and the sixth is with oxygen.
Reid WolffLv2
8 Feb 2019