Product: COX4I1 Antibody
Catalog: BF0251
Description: Mouse monoclonal antibody to COX4I1
Reactivity: Human, Mouse, Rat, Monkey
Mol.Wt.: 19kDa; 20kD(Calculated).
Uniprot: P13073
RRID: AB_2833839

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Product Info

ELISA 1:10000, WB 1:500-1:2000, IF/ICC 1:200-1:1000, FCM 1:200-1:400
*The optimal dilutions should be determined by the end user.

WB: For western blot detection of denatured protein samples. IHC: For immunohistochemical detection of paraffin sections (IHC-p) or frozen sections (IHC-f) of tissue samples. IF/ICC: For immunofluorescence detection of cell samples. ELISA(peptide): For ELISA detection of antigenic peptide.

Monoclonal [AFB1815]
COX4I1 antibody detects endogenous levels of total COX4I1.
Cite Format: Affinity Biosciences Cat# BF0251, RRID:AB_2833839.
Mouse IgG1 in phosphate buffered saline (without Mg2+ and Ca2+), pH 7.4, 150mM NaCl, 0.02% sodium azide and 50% glycerol. Store at -20 °C. Stable for 12 months from date of receipt.


AL024441; COX 4; COX IV 1; COX IV; COX IV-1; Cox4; COX41_HUMAN; Cox4a; COX4B; COX4I1; COX4I2; COX4L2; COXIV; Cytochrome c oxidase polypeptide IV; Cytochrome c oxidase subunit 4 isoform 1 mitochondrial; Cytochrome c oxidase subunit 4 isoform 1, mitochondrial; Cytochrome C Oxidase subunit IV; Cytochrome c oxidase subunit IV isoform 1; Cytochrome c oxidase subunit IV isoform 2 (lung); Cytochrome c oxydase subunit 4; dJ857M17.2; MGC105470; MGC72016;



Purified recombinant fragment of human COX4I1 expressed in E. Coli.

P13073 COX41_HUMAN:


Cytochrome c oxidase (COX) is the terminal enzyme of the mitochondrial respiratory chain. It is a multi-subunit enzyme complex that couples the transfer of electrons from cytochrome c to molecular oxygen and contributes to a proton electrochemical gradient across the inner mitochondrial membrane. The complex consists of 13 mitochondrial- and nuclear-encoded subunits. The mitochondrially-encoded subunits perform the electron transfer and proton pumping activities. The functions of the nuclear-encoded subunits are unknown but they may play a role in the regulation and assembly of the complex. This gene encodes the nuclear-encoded subunit IV isoform 1 of the human mitochondrial respiratory chain enzyme. It is located at the 3' of the NOC4 (neighbor of COX4) gene in a head-to-head orientation, and shares a promoter with it.

PTMs - P13073 As Substrate

Site PTM Type Enzyme
K12 Methylation
S26 Phosphorylation
K29 Ubiquitination
S30 Phosphorylation
S34 Phosphorylation
Y38 Phosphorylation
K53 Acetylation
K53 Ubiquitination
S58 Phosphorylation
K60 Acetylation
K60 Ubiquitination
K63 Methylation
K67 Acetylation
S72 Phosphorylation
S74 Phosphorylation
K87 Acetylation
K87 Ubiquitination
S89 Phosphorylation
Y124 Phosphorylation
S132 Phosphorylation
K135 Acetylation
K135 Ubiquitination
K140 Ubiquitination
K149 Ubiquitination
S158 Phosphorylation
K159 Ubiquitination
K164 Acetylation
K164 Ubiquitination
K168 Acetylation

Research Backgrounds


Component of the cytochrome c oxidase, the last enzyme in the mitochondrial electron transport chain which drives oxidative phosphorylation. The respiratory chain contains 3 multisubunit complexes succinate dehydrogenase (complex II, CII), ubiquinol-cytochrome c oxidoreductase (cytochrome b-c1 complex, complex III, CIII) and cytochrome c oxidase (complex IV, CIV), that cooperate to transfer electrons derived from NADH and succinate to molecular oxygen, creating an electrochemical gradient over the inner membrane that drives transmembrane transport and the ATP synthase. Cytochrome c oxidase is the component of the respiratory chain that catalyzes the reduction of oxygen to water. Electrons originating from reduced cytochrome c in the intermembrane space (IMS) are transferred via the dinuclear copper A center (CU(A)) of subunit 2 and heme A of subunbit 1 to the active site in subunit 1, a binuclear center (BNC) formed by heme A3 and copper B (CU(B)). The BNC reduces molecular oxygen to 2 water molecules using 4 electrons from cytochrome c in the IMS and 4 protons from the mitochondrial matrix.

Subcellular Location:

Mitochondrion inner membrane>Single-pass membrane protein.

Extracellular region or secreted Cytosol Plasma membrane Cytoskeleton Lysosome Endosome Peroxisome ER Golgi apparatus Nucleus Mitochondrion Manual annotation Automatic computational assertionSubcellular location
Tissue Specificity:


Subunit Structure:

Component of the cytochrome c oxidase (complex IV, CIV), a multisubunit enzyme composed of 14 subunits. The complex is composed of a catalytic core of 3 subunits MT-CO1, MT-CO2 and MT-CO3, encoded in the mitochondrial DNA, and 11 supernumerary subunits COX4I1 (or COX4I2), COX5A, COX5B, COX6A1 (or COX6A2), COX6B1 (or COX6B2), COX6C, COX7A2 (or COX7A1), COX7B, COX7C, COX8A and NDUFA4, which are encoded in the nuclear genome. The complex exists as a monomer or a dimer and forms supercomplexes (SCs) in the inner mitochondrial membrane with NADH-ubiquinone oxidoreductase (complex I, CI) and ubiquinol-cytochrome c oxidoreductase (cytochrome b-c1 complex, complex III, CIII), resulting in different assemblies (supercomplex SCI(1)III(2)IV(1) and megacomplex MCI(2)III(2)IV(2)). Interacts with AFG1L. Interacts with PHB2; the interaction decreases in absence of SPHK2 (By similarity).


Belongs to the cytochrome c oxidase IV family.

Research Fields

· Human Diseases > Endocrine and metabolic diseases > Non-alcoholic fatty liver disease (NAFLD).

· Human Diseases > Neurodegenerative diseases > Alzheimer's disease.

· Human Diseases > Neurodegenerative diseases > Parkinson's disease.

· Human Diseases > Neurodegenerative diseases > Huntington's disease.

· Metabolism > Energy metabolism > Oxidative phosphorylation.

· Metabolism > Global and overview maps > Metabolic pathways.

· Organismal Systems > Circulatory system > Cardiac muscle contraction.   (View pathway)

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