Table 1.

Characteristics of target vectors

Vector	Promoter 1	Reporter 1	Target	Promoter 2	Reporter 2	Target
pEGFP-bPrP	CMV	EGFP	bPRNP
pGL3-bPrP	SV40	Fire-fly luciferase	bPRNP
pFluc-bPrP-Rluc	SV40	Fire-fly luciferase	bPRNP	HSV-TK	Renilla luciferase*
pFluc-Rluc-bPrP	SV40	Fire-fly luciferase*		HSV-TK	Renilla luciferase	bPRNP
pTKFluc-bPrP-Rluc	HSV-TK	Fire fly luciferase	bPRNP	HSV-TK	Renilla luciferase*

*, used as the internal control.