Acetyl CoA and ETC part 4 Flashcards
with a LOWER ENERGY LEVEL than complex I
Complex II
FADH2 transfers hydrogen and electrons to COENZYME Q
Complex II
Q is reduced to QH2 and _____ is regenerated
FAD
a mobile carrier, transfers hydrogen to complex III
QH2
MULTISUBUNIT PROTEIN complex containing
Complex III (cytochrome reductase)
Iron-sulfur clusters
Cytochrome b
Cytochrome c1
Complex III
Contains IRON-PHOTOPORPHYRIN also found in HEMOGLOBIN and MYOGLOBIN
Cytochrome B
Cytochrome c1
Transfers electrons from Q to cytochrome C
Complex III
MULTISUBUNIT PROTEIN complex containing
Complex IV (Cytochrome oxidase)
2 copper
2 heme
Complex IV
Complex III
- Electrons are transferred from QH2 to 2 CYT b
- Each Cyt b (Fe3+) is reduced to Cyt b (Fe2+)
- Q is regenerated
- Electrons are transferred from Cyt b to Fe-S clusters, to Cyt c1, and Cyt c, the second mobile carrier
second mobile carrier
Cyt c
Complex IV, electrons are transferred from
- Cyt c to Cyt a
- Cyt a to Cyt a3
- Cyt a3 to OXYGEN and H+ to form WATER
Cyt c-Cyt a-Cyt a3-Oxygen and H+=water
Flows of electrons through the electron transport complexes pumps protons across the inner membrane from the matrix to the
intermembrane space
