< 0.5% cross-reactivity observed with available related molecules.< 50% cross-species reactivity observed with species tested.
No significant interference observed with available related molecules.
The Parameter beta 2-Microglobulin Immunoassay is a 1.5 hour forward sequential competitive enzyme immunoassay designed to measure beta 2M in serum, plasma, and urine.
Intra-Assay Precision (Precision within an assay) Three controls of known concentration were tested twenty times on one plate to assess intra-assay precision.
Inter-Assay Precision (Precision between assays) Three controls of known concentration were tested in twenty separate assays to assess inter-assay precision. Assays were performed by at least three technicians using two lots of components.
Serum, EDTA Plasma, Heparin Plasma, Urine
The recovery of human beta 2M spiked to levels throughout the range of the assay in various matrices was evaluated.
Average % Recovery
EDTA Plasma (n=4)
Heparin Plasma (n=4)
To assess the linearity of the assay, samples containing and/or spiked with high concentrations of human beta 2M were serially diluted with calibrator diluent to produce samples with values within the dynamic range of the assay.
Preparation and Storage
Store the unopened product at 2 - 8 °C. Do not use past expiration date.
Background: beta 2-Microglobulin
beta 2-Microglobulin (B2M) forms the light chain of Class I MHC molecules. It has been measured in a variety of body fluids, including serum/plasma, saliva, CSF, and urine. B2M freely passes through the glomerular membrane, but it is nearly completely reabsorbed and degraded in proximal tubule cells. Clinically, serum B2M is elevated in rheumatoid arthritis, systemic lupus erythematosus, viral infections, and conditions associated with decreased glomerular filtration.
Entrez Gene IDs
567 (Human); 12010 (Mouse); 24223 (Rat);
B2M; beta 2Microglobulin; beta chain of MHC class I molecules; beta-2-microglobin; beta-2-microglobulin;