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. 1998 Oct 13;95(21):12580–12585. doi: 10.1073/pnas.95.21.12580

Table 2.

Characteristics of target lines

Line Basal PrP-A expression, %* Induction by tTA
Fibroblasts Tg mice
tetO-PrP/E6539 <1 ++
tetO-PrP/E6550 25–50 ++++ +++
tetO-PrP/E6725 10 ++ ND
tetO-PrP/E6740 10 ++++ ++
tetO-PrP/E7655 2 ++ +

ND, not determined. 

*

Expression levels reported were standardized by using FVB PrPC levels as 100%