The fetuin N-linked glycan library in this product have been released from 50 µgs of a fetuin standard that is purified from fetal calf serum. A mixture of bi-, tri-, and tetra-antennary glycan standards with variable sialylation released from fetuin glycoprotein. A fetuin O-linked glycan library and a fetuin glycoprotein are also available. Source The glycans in this product are released from a fetuin standard that is purified from fetal calf serum. Fetuin is a glycoprotein present in the circulation which is synthesized by hepatocytes. Fetuin exists in a variety of glycoforms containing bi-, tri-, and tetra- antennary oligosaccharides with variable sialylation. Form Dry. Lyophilised powder.