Complex COX4I1:COX4I2:COX5A:COX5B:COX6A1:COX6A2:COX7A1:COX7A2:COX7A2L:COX7B:COX7C:COX8A:MT-CO1:MT-CO2:MT-CO3 
 
Complex composition:
- COX6A1 
  - COX7B 
  - COX7A2 
  - COX7C 
  - COX4I2 
  - COX6A2 
  - COX5A 
  - COX4I1 
  - MT-CO1 
  - MT-CO2 
  - MT-CO3 
  - COX8A 
  - COX7A1 
  - COX7A2L 
  - COX5B 
  
Modifications:
Participates in complexes:
In compartment: mitochondrial matrix
- COX4I1:COX4I2:COX5A:COX5B:COX6A1:COX6A2:COX7A1:COX7A2:COX7A2L:COX7B:COX7C:COX8A:MT-CO1:MT-CO2:MT-CO3@mitochondrial matrix 
 
 
Participates in reactions:
As Reactant or Product:- CI:CII:CIII:CIV:CV:Fe-S@mitochondrial matrix 
  → 
  COX4I1:COX4I2:COX5A:COX5B:COX6A1:COX6A2:COX7A1:COX7A2:COX7A2L:COX7B:COX7C:COX8A:MT-CO1:MT-CO2:MT-CO3@mitochondrial matrix 
 
 
As Catalyser:- O2@mitochondrial matrix 
  + CYCS|reduced@mitochondrial matrix 
  + H+@mitochondrial matrix 
  → 
  H2O@mitochondrial matrix 
  + CYCS|oxidized@mitochondrial matrix 
  + H+@mitochondrion