Chemistry

Chemistry, 26.07.2019 18:00, misst002

Each hemoglobin molecule has heme group(s) and globin molecule(s).

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Chemistry, 16.10.2019 16:30, albusaidi4480

Identify the true statements regarding the heme group of myoglobin and hemoglobin. the iron in the heme group can form six bonds. the fifth is with an imidazole ring of a histidine, and the sixth is with oxygen. the globin chains of myoglobin and hemoglobin prevent the oxidation of fe2+fe2+ to fe3+fe3+ , which irreversibly binds oxygen. the cooperativity of oxygen binding in hemoglobin arises from a shorter fe−o2fe−o2 bond length in the t state compared to the r state. a heme group contains four pyrrole rings, which are linked via methene (methine) bridges. the heme group is conjugated. myoglobin contains one heme group. the r state of hemoglobin has greater affinity for o2o2 than the t state because the iron atom is in the plane of the porphyrin ring.

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Biology, 16.10.2019 21:20, jordanlacie65

Which five statements about hemoglobin and myoglobin structure are true? heme is composed of an organic protoporphyrin component and a metal atom. both hemoglobin and myoglobin contain a prosthetic group called heme, which contains a central iron atom. each hemoglobin molecule can bind four oxygen molecules; each myoglobin can bind only one oxygen molecule. hemoglobin and myoglobin are heterotetramers. each iron atom can form six coordination bonds. two of these bonds are formed between iron and oxygen. molecular oxygen binds reversibly to fe2+fe2+ in heme. by itself, heme is not a good oxygen carrier. it must be part of a larger protein to prevent oxidati

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Biology, 23.10.2019 04:30, dukes1207

Identify the true statements regarding the heme group of myoglobin and hemoglobin. the cooperativity of oxygen binding in hemoglobin arises from a shorter fe−o2 bond length in the t state compared to the r state. hemoglobin contains four heme groups. the globin chains of myoglobin and hemoglobin prevent the oxidation of fe2+ to fe3+ , which irreversibly binds oxygen. the iron in the heme group can form six bonds. the fifth is with an imidazole ring of a histidine, and the sixth is with oxygen. a heme group contains four pyrrole rings, which are linked via methene (methine) bridges. the heme group is conjugated. the r state of hemoglobin has greater affinity for o2 than the t state because the iron atom is in the plane of the porphyrin ring.

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