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Catalog # HM2308

TRACP5a, Human, mAb 220


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Monoclonal antibody 220 recognizes human tartrate-resistant-acid phosphatase 5a (TRACP5a). TRACP is considered a marker for differentiated monocytes like macrophages, dendritic cells and osteoclasts. It is also considered to be a serum marker for bone disease. TRACP has two isotypes (5a &5b) with different characteristics. Isoform 5a is intact and bears a sialic acid and has a lower activity and pH optimum (pH5.0-5.2) than TRACP5b (pH5.8-6.0). TRACP5a circulates as a 35kD glycoprotein and 5b as a linked heterodimer of proteolytically cleaved16 & 23 kDa fragments. TRACP5a has unique epitopes associated with the intact loop peptide. Antibody 220 recognizes the regulatory loop peptide which interacts with the active site of TRACP5a.
Serum TRACP protein is predominantly isoform 5a, while most of the activity is due to isoform 5b. TRACP5a, but not 5b is secreted by activated macrophages and dendritic cells and is therefore considered a marker for systemic macrophage and chronic inflammation. TRACP 5a levels are correlated positively with inflammation-related markers CRP, ferritin, and triglycerides, which are also elevated in cardiovascular patients (CVD), but have no relationship to TRAP 5b activity or other bone metabolic markers. TRACP5a is a specific secreted marker of inflammatory macrophages relevant to their systemic number. TRACP5b is a marker for osteoclast number and bone resorption.
The clinical significance of TRACP5a is not completely clear yet. TRACP5a levels are elevated in end stage renal disease, 30% of rheumatoid arthritis patients and was positively correlated with body mass and fat indices (adipose tissue macrophages). Elevated serum TRACP5a may be an indicator of advanced or systemic inflammatory disease associated with inflammatory vulnerable plaque and a risk marker for adverse events in CVD.

Immuno assays, Immuno precipitation, Paraffin sections, Western blot

Application Notes
W: A non-reduced and reduced sample treatment and SDS-Page was used. The band size is 35 kDa (Ref.1). IHC-P: Tissue sections were pretreated with prior heat-induced antigen retrieval by incubation overnight at 72 °C in a commercial solution of EDTA at pH 8.0. (Ref.1).

For immunohistochemistry, immunoprecipitation, immuno assays and Western blotting, dilutions to be used depend on detection system applied. It is recommended that users test the reagent and determine their own optimal dilutions. The typical starting working dilution is 1:50. For functional studies, in vitro dilutions have to be optimized in user’s experimental setting

Positive Control
Granular cell tumor of the skin and ductal carcinoma of the breast

Negative Control
mouse IgG at 1 μg/mL (Western Blot)

Product type
Monoclonal antibodies
100 µg, 20 µg
0.2 ml (100 µg/ml) 0.2 µm filtered antibody solution in PBS, containing 0.1% bovine serum albumin and 0.02% sodium azide.
Recombinant TRACP
Mouse IgG1
Storage and stability
Product should be stored at 4°C. Under recommended storage conditions, product is stable for at least one year. The exact expiry date is indicated on the label.
For research use only. Not for use in or on humans or animals or for diagnostics. It is the responsibility of the user to comply with all local/state and federal rules in the use of this product. Hycult Biotech is not responsible for any patent infringements that might result from the use or derivation of this product.
Autoimmunity, Tumor immunology
CoA-TDS HM2200 - 2300
80 kb
CoA-TDS HM2300-HM2400 Safety Data Sheet

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