The ErbB-2 (HER-2/neu) proto-oncogene encodes a 185kD transmembrane receptor protein. It has partial homology with the epidermal growth factor (EGF) receptor and shares intrinsic tyrosine kinase activity with the receptor. ErbB-2 heterodimerizes with the EGF receptor, ErbB-3 receptor, and the ErbB-4 receptor. In human breast and ovarian cancers the receptor is activated through amplification and over-expression of the wild-type gene. This alteration occurs in 25%-30% of cases and is associated with a poor prognosis. The poor prognosis of ovarian and breast cancer patients associated with ErbB-2-mediated high rate of tumor cell proliferation. ErbB-2 may play a role in the genesis of human gastric, endometrial and salivary gland cancers. The concentration of ErbB-2 protein in serum can be a sensitive indicator for prognosis of the gastric carcinoma that expressed ErbB-2. ErbB-2 oncoprotein is detectable in adenocarcinomas as well as in transitional cell carcinomas.
Applications:
Suitable for use in Western Blot. Other applications not tested.
Recommended Dilution:
Western Blot: 0.5-2ug/ml
Optimal dilutions to be determined by the researcher.
Storage and Stability:
May be stored at 4 degrees C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20 degrees C. Aliquots are stable for at least 12 months. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.