bioquimica 2
DESCRIPTION
Aula de Bioquimica IITRANSCRIPT
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FOSFORILAÇÃO OXIDATIVA: A
CADEIA DE TRANSPORTE DE
ELÉTRONS Prof. Heberth de Paula 1
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A MITOCÔNDRIA
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A CADEIA DE TRANSPORTE DE ELÉTRONS
Local
Membrana interna da mitocôndria
Função
Transferir os elétrons de NADH e FADH2 para o
oxigênio, reduzindo este à água. Esta transferência
resulta na síntese de ATP.
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COMPLEXO I: DE NADH À UBIQUINONA
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TRANSPORTADORES DE
FAD
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ESTRUTURA
MOLECULAR DO
COMPLEXO II
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UBIQUINONA
OU
COENZIMA-Q
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COMPLEXO III: UBIQUINONA À
CITOCROMO C
Caminho de elétrons complicado, porém o efeito
global é simples: QH2 é oxidado e duas moléculas
de Citocromo c são reduzidas
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COMPLEXO IV:
CITOCROMO C
À O2
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RESUMINDO TUDO...
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PRODUÇÃO DE ATP
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A ATP-SINTASE
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A PRODUÇÃO DE ATP NA ATP-SINTASE
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TRANSPORTES MITOCONDRIAIS
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PRODUÇÃO DE
CALOR
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REGULAÇÃO
Disponibilidade de substratos
H+
ADP
Pi
NADH
FADH2
O2
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