while egf alone at 100 ng/ml causes threefold multiplication at four days and brain fgf causes a sixfold increase , egf acts synergistically with sm-c/igf-i , msa/rigf-ii , insulin or proinsulin to cause 18-fold multiplication , and brain fgf acts synergistically with igfs to cause 20-fold multiplication .
C0021665
igf-i
C0037657
igfs