• PN: B111434


45x Ab-conjugated beads (S4P12 - human MPO Ab-bead). PN: B111434A. One vial containing 100 µL of anti-human MPO conjugated to AimPlex Bead S4P12.

25x Biotin-detection Ab (human MPO Biotin-dAb). PN: B111434B. One vial containing 100 µL of biotinylated anti-human MPO.

Lyophilized Standard Mix-Human Group 2 Panel B, 10-Plex. PN: HG20010. One vial containing lyophilized recombinant human IL-17F, IL-20, IL-21, IL-28A, IL-29, IL-33, M-CSF, MPO, TSLP, and VEGF-A. Note: If multiple analyte kits on the above target list are ordered as a panel, only one vial of standard mix is supplied for those analyte kits. 

STORAGE:  2-8 C in the dark.

IMPORTANT: Sodium azide forms explosive compounds with heavy metals. These products contain <0.05% (w/w) azide which with repeated contact with lead and copper commonly found in plumbing drains may result in the buildup of shock sensitive compounds. Dispose in accordance with regulations from your institute.

APPLICATION: Optimal antibody pair and antigen standard for assaying human MPO.  Can be multiplexed with other analytes in Human Group 2.  To be used in conjunction with the AimPlex NR Basic Kit (PN: P100001) and a diluent kit. Refer to the AimPlex Multiplex Immunoassay User Manual and kit inserts for the assay procedure.

For Research Use Only.  Not for use in diagnostic procedures.

Assay Specifications:

Sample types: Cell culture supernatant, serum, plasma, bodily fluid and tissue/cell lysate

Sensitivity (LOD): < 10 pg/mL

Quantitation range:

LLOQ: < 20 pg/mL

ULOQ: > 5,000 pg/mL

Standard dose recovery: 70-130%

Intra-assay CV: < 10%

Inter-assay CV: < 20%

Cross-reactivity of analytes in Human Group 2: Negligible

Sample volume: 15 µL/test


Myeloperoxidase (MPO) is a peroxidase enzyme that in humans is most abundantly expressed in neutrophil granulocytes, and produces hypohalous acids to carry out their antimicrobial activity. It is a lysosomal protein stored in azurophilic granules of the neutrophil and released into the extracellular space during degranulation. MPO has a heme pigment, which causes its green color in secretions rich in neutrophils, such as pus and some forms of mucus. Myeloperoxidase deficiency is a hereditary deficiency of the enzyme, which predisposes to immune deficiency. Antibodies against MPO have been implicated in various types of vasculitis, most prominently three clinically and pathologically recognized forms: granulomatosis with polyangiitis (GPA, formerly Wegener's granulomatosis), microscopic polyangiitis (MPA); and eosinophilic granulomatosis with polyangiitis (EGPA, formerly Churg–Strauss syndrome). Antibodies are also known as anti-neutrophil cytoplasmic antibodies (ANCAs), though ANCAs have also been detected in staining of the perinuclear region. Recent studies have reported an association between elevated myeloperoxidase levels and the severity of coronary artery disease. And Heslop et al. reported that elevated MPO levels more than doubled the risk for cardiovascular mortality over a 13-year period. It has also been suggested that myeloperoxidase plays a significant role in the development of the atherosclerotic lesion and rendering plaques unstable. Diseases associated with MPO include myeloperoxidase deficiency and mediastinitis.


1.      PDB: 1D7W; Blair-Johnson M, Fiedler T, Fenna R (November 2001). "Human myeloperoxidase: structure of a cyanide complex and its interaction with bromide and thiocyanate substrates at 1.9 Å resolution". Biochemistry 40 (46): 13990–7. doi:10.1021/bi0111808. PMID 11705390.

2.      Klebanoff SJ (May 2005). "Myeloperoxidase: friend and foe". Journal of Leukocyte Biology 77 (5): 598–625. doi:10.1189/jlb.1204697. PMID 15689384.

3.      Kinkade JM, Pember SO, Barnes KC, Shapira R, Spitznagel JK, Martin LE (Jul 1983). "Differential distribution of distinct forms of myeloperoxidase in different azurophilic granule subpopulations from human neutrophils". Biochemical and Biophysical Research Communications 114 (1): 296–303. doi:10.1016/0006-291x(83)91627-3. PMID 6192815.