CA 19-9, Human (Carbohydrate Antigen 19-9, Sialylated Lewis A, LEA)

Molecular Biology / MB-Tumor Markers

-20°C

Supplied as a liquid in PBS, pH 7.4, 0.09% sodium azide.

Gastrointestinal tumor antigen is a large glycoprotein defined by a carbohydrate epitope, CA 19-9, located on a protein core mucin. It is referred to in the literature as sialylated Lewis A (Lea). It is over expressed by epithelial tumors of the gastro intestine including the stomach, small and large intestine, colon, pancreas and cervix. These mucins are largely carbohydrate, 80-90%.

Source:
CA 19-9, from human ascites fluid.

Activity:
~20, 000-120, 000 U/ml (Roche EIA)

Applications:
Suitable for use for making standards, calibrators, and single analyte controls. Other applications not tested.

Recommended Dilution:
Optimal dilutions to be determined by the researcher.

Storage and Stability:
May be stored at 4°C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20°C. Aliquots are stable for 6 months after receipt at -20°C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.