The present invention relates to {HEAD ~ genes} which encode novel proteins related to a family of receptor proteins typified by two related membrane spanning {TAIL ~ tyrosine kinases}: the Epidermal Growth Factor receptor , which is encoded by the erbB gene, the normal human counterpart of an oncogene that was first recognized in the proviral DNA of avian erythroblastosis virus; and the receptor encoded by the related gene erbB 2 
The present invention relates to { HEAD ~ genes } which encode novel proteins related to a family of receptor proteins typified by two related membrane spanning { TAIL ~ tyrosine kinases } : the Epidermal Growth Factor receptor , which is encoded by the erbB gene , the normal human counterpart of an oncogene that was first recognized in the proviral DNA of avian erythroblastosis virus ; and the receptor encoded by the related gene erbB 2
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