Abstract
Point mutations of the Syrian hamster neu proto-oncogene have been observed in the transmembrane domain of N-nitroso- N-ethylurea(ENU)-induced neurofibromas, Genomic DNA derived from tumor tissue showed transforming activity in an NIH 3T3 assay and a cDNA clone of the hamster neu gene, containing the entire protein-coding region, was isolated from a transformant cDNA library. The encoded product is 92 and 88% homologous to the rat neu and the human c- erbB-2, respectively. The product of the mutated hamster neu gene showed increased autophosphorylation of Tyr residues.
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