Merck, F3385-1G, Fetuin from fetal bovine serum

General description
Fetuin from fetal bovine serum is a plasma glycoprotein. It is a 64 kDa glycoprotein, which is produced by the liver and adipose tissue.
A glycoprotein derived from FBS that is used as Fetuin has been used at a concentration of 500 mg/ml to supplement serum free F12 medium (along with insulin, transferrin and 2-mercaptoethanol) in culture of embryonal carcinoma cells.
Application
Fetuin from fetal bovine serum has been used:
as a substrate to determine neuraminidase activity
to validate the specificity of sialidases
to stabilize m-calpain

Biochem/physiol Actions
Fetuin acts as an inhibitor of insulin receptor tyrosine kinase. It modulates bone remodeling and calcium metabolism. Fetuin regulates vascular calcification, insulin resistance, protease activity control, keratinocytes migration and breast tumor cell proliferative signaling. It functions as a biomarker for neurodegenerative diseases. Fetuin exhibits anti-inflammatory property.
Preparation Note
Prepared by ammonium sulfate fractionation of fetal bovine serum by the method of Pederson, K.O., J. Phys. and Colloid Chem., 51, 164 (1947).