Degradation of epidermal growth factor receptors by cathepsin L-like protease: Inhibition of the degradation by c-Ha-rasgene products

Abstract
Extract of N1H3T3 mouse fibroblasts contains a protease which can cleave epidermal growth factor receptor (EGF receptor). This protease was tentatively named cathepsin X and purified to near homogeneity. The characteristics of cathepsin X were similar to those of cathepsin L and the proteolytic activity of cathepsin X was inhibited by c‐Ha‐ras gene products.