Characterization of mouse cell lines. (A) ERwt
(EGF receptor-positive) and NR6 (EGF receptor-negative) cells were
lysed and immunoprecipitated with a human-specific EGF receptor mAb
recognizing an exocytic amino acid epitope (EGFR-exo), followed by
immunoblotting with an EGF receptor rabbit peptide
antiserum to a cytosolic epitope (EGFR-cyt). (B) Cells were
mock-treated (−) or infected with adenovirus (+) and harvested 18
h later. (C) Adenovirus-infected cells were harvested 15–18 h after
infection (p.i.). (B and C) Total cellular protein (∼80 μg)
resolved by SDS-PAGE was immunoblotted with an
E3-13.7–specific rabbit peptide antiserum. Molecular weight standards:
myosin, 200,000; β-galactosidase, 116,300; soybean trypsin inhibitor,
21,500; lysozyme, 14,400.