Anti-CD42a Antibody, platelet lb-IX, clone FMC-25

This antibody belongs to CD42a (assigned at the Fourth International Workshop on Leukocyte Differentiation Antigens, Vienna, 1989) (Knapp, 1989), and binds to the 22,000 dalton IX subunit of the glycoprotein Ib-IX complex (Zola et al., 1984; Berndt et al., 1985a,b). FMC-25 failed to bind to platelets from patients with Bernard-Soulier Syndrome (Berndt et al., 1983). The antibody is specific for cells of the platelet megakaryocyte lineage. It reacts with a proportion of acute myeloid leukemias being useful in identifying those of the megakaryoblastic subtype (San Miguel et al., 1985, 1986).

Cell reactivity:

The antibody is specific for cells of the platelet megakaryocyte lineage. It reacts with a proportion of acute myeloid leukemias being useful in identifying those of the megakaryoblastic subtype(San Miguel et al., 1985, 1986).

Epitope: platelet lbalpha complex

Peripheral blood mononuclear cells isolated on Ficoll^® hypaque.

Anti-CD42a Antibody, platelet lb-IX, clone FMC-25 detects level of CD42a & has been published & validated for use in FC, IC, IH.

Research Category
Inflammation & Immunology

Research Sub Category
Immunoglobulins & Immunology

The glycoprotein Ib-IX complex on the surface of normal platelets is a heterotrimer of Ib-alpha, Ib-beta and IX subunits (Berndt, 1989). Ib-IX complex is an essential component of platelet adhesion to vascular subendothelium and is also important in the maintenance of platelet shape (Berndt et al., 1988).

This antibody is suitable for enumeration of platelets by flow cytometry and immunoperoxidase staining of frozen tissue sections or air dried smear preparations (San Miguel et al., 1986), and for identification of megakaryoblasts in acute myeloid leukemia or acute myelofibrosis (San Miguel et al., 1985; San Miguel et al., 1986).

SUGGESTED USAGE DILUTION

1. Flow cytometry and indirect immunofluorescence 1:25

Dilute with isotonic buffer. Use 50 μl of diluted antibody per 1 x 10E6 platelets in 100 μl of buffer.

2. Indirect immunoperoxidase staining - the final dilution will depend on the assay conditions and detection system employed. However, a dilution of at least 1:20 will be applicable to most commonly used systems.

Format: Purified

Purified immunoglobulin. The antibody is supplied in 25mM Tris-HCl, 0.4M NaCl, pH 8.0 containing 0.2% bovine serum albumin and 0.1% sodium azide. The characteristics of each lot are tested by electrophoresis and flow cytometry.

Store at 2 to 8°C, for up to 6 months. For prolonged periods, store below -20°C in undiluted aliquots. AVOID REPEATED FREEZE/THAW CYCLES.

WARNING: The monoclonal reagent solution contains 0.1% sodium azide as a preservative. Due to potential hazards arising from the build up of this material in pipes, spent reagent should be disposed of with liberal volumes of water.

Concentration: Please refer to the Certificate of Analysis for the lot-specific concentration.

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