An epidermal growth factor (EGF)-like transforming growth factor was identified in acid/ethanol extracts of 19-day-old rat embryos. This factor had an apparent molecular weight of 55,000 and possessed EGF-competing activity, stimulated DNA synthesis in quiescent Rat-1 fibroblasts, and induced progressive growth of untransformed cells in soft agar. The factor was trypsin sensitive and required intact disulfide bonds for colony stimulating activity. It was determined to be distinct from adult mouse submaxillary gland EGF based on its elution from BioGel P-60 column and its increased colony stimulating activity/unit of EGF-competing activity.
|Original language||English (US)|
|Number of pages||9|
|Journal||Biochemical and Biophysical Research Communications|
|State||Published - Aug 16 1982|
ASJC Scopus subject areas
- Molecular Biology
- Cell Biology