radioiodinated epidermal growth factor ( egf , mr 6045 , pi 4.4 ) , transforming growth factor type alpha ( tgf alpha , mr 5623 , pi 6.8 ) , insulin-like growth factor ( igf-i , mr 7649 , pi 8.3 ) , and basic fibroblast growth factor ( bfgf , mr 15,000-17,000 , pi 9.6 ) all transferred with high efficiency ( 74.1 +/- 12.6 % ) to a positively charged nylon membrane .
C0037657
insulin-like growth factor
C0021665
igf-i