Table 1.

E3-13.7 and EGF receptor protein turnover kinetics

	E3-13.7	EGF receptor	EGF receptor
Infecting virusa	in724	in724	dl753
Protein half-life (h)b	5.3	2.9	21.1
Turnover rate (molecules/min)c	59	249	106

^a ERwt cells were infected with in724, which overexpresses E3-13.7, or dl753, which does not produce E3-13.7. 

^b From linear regression analysis of metabolically labeled protein decay plots (our unpublished data). Values in the table were derived from a single experiment. Similar values were obtained for each molecule in at least two independent experiments. 

^c Calculation made by converting arbitrary phosphorimage units to total number of molecules labeled (see MATERIALS AND METHODS).