Purity ~85% (SDS-PAGE). Pgf, also known as placenta growth factor isoform 1, is abundant in trophoblastic giant cells associated with the parietal yolk sac at early stages of embryogenesis. The secretion of Pgf by trophoblastic giant cells is likely to be the signal which initiates and co-ordinates vascularization in the deciduum and placenta during early embryogenesis. Source: Recombinant protein corresponding to aa27-158 from mouse Pgf, fused to His-tag at C-terminal expressed in insect cell. Molecular Weight: ~15.9kD (138aa) AA