Molecular Weight：Approximately 38.8 kDa, a disulfide-linked homodimeric protein consisting of two 165 amino acid polypeptide chains with Met at N-terminus.
Biological Activity：Fully biologically active when compared to standard. The ED50 as determined by a cell proliferation assay using human umbilical vein endothelial cells(HUVEC) is less than 5 ng/ml, corresponding to a specific activity of > 2.0 × 105 IU/mg.
Purity：> 95 % by SDS-PAGE and HPLC analyses.
Formulation：Lyophilized from a 0.2 μm filtered solution in PBS, pH 7.4.
