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. 1983 Aug;80(15):4684–4688. doi: 10.1073/pnas.80.15.4684

Transforming growth factors produced by retrovirus-transformed rodent fibroblasts and human melanoma cells: amino acid sequence homology with epidermal growth factor.

H Marquardt, M W Hunkapiller, L E Hood, D R Twardzik, J E De Larco, J R Stephenson, G J Todaro
PMCID: PMC384108  PMID: 6308641

Abstract

Transforming growth factors (TGFs) were purified from serum-free medium conditioned by retrovirus-transformed Fisher rat embryo fibroblasts, mouse 3T3 cells, and two human melanoma cell lines. The purification of each TGF was monitored in a radioreceptor assay based on receptor crossreactivity with mouse submaxillary gland epidermal growth factor (mEGF) and was achieved by gel permeation chromatography of the acid-soluble TGF-containing activity, followed by reverse-phase high-pressure liquid chromatography with sequential use of acetonitrile and 1-propanol in the presence of aqueous trifluoroacetic acid. The amino-terminal sequences of rat, mouse, and human TGFs were determined. Extensive sequence homology was found among TGF polypeptides from different species and cell types. Alignment of the amino acid sequences of rat TGF, mEGF, and human urogastrone (hEGF) reveals statistically significant sequence homology. The reported results suggest that TGFs that compete for binding to the cellular EGF receptor and EGF may have evolved from a common progenitor.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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