Abstract
1. 1. An epidermal growth factor (EGF)-like activity was detected and partially purified from swiftlet's nest extract. 2. 2. The partially purified EGF-like activity was able to (a) generate competitive binding curves parallel to the standard curves in radioreceptor assay and (b) stimulate thymidine incorporation in quiescent culture of 3T3 fibroblasts and the latter activity can be suppressed by mouse EGF antibody. 3. 3. Partial characterization of the EGF-like activity in terms of pl, molecular weight and its behavior on gel filtration column suggest that it bears similar physical properties to the EGF's isolated from the mouse and the shrew.
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