{TAIL ~ Characterization} of {HEAD ~ the cloned DNA fragment} mapped the region of v erbB homology to three exons with closest homology of 64% and 67% to a contiguous region within the tyrosine kinase domains of the EGFR and erbB 2 proteins, respectively 
{ TAIL ~ Characterization } of { HEAD ~ the cloned DNA fragment } mapped the region of v erbB homology to three exons with closest homology of 64 % and 67 % to a contiguous region within the tyrosine kinase domains of the EGFR and erbB 2 proteins , respectively
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