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. 2007 Nov 22;116(3):284–291. doi: 10.1289/ehp.10727

Table 3.

Curve classification and potency distribution of the NTP 1,408 compounds in rat primary kidney proximal tubule cells.

Curve classificationa
IC50 range 1a 1b 2a 2b 3 4
< 100 nM (%) 1 (0.07) 2 (0.1) 0 0 0
1 μM–100 nM (%) 5 (0.4) 0 0 0 0
10 μM–1 μM (%) 10 (0.7) 0 0 4 (0.3) 0
80 μM–10 μM (%) 23 (1.6) 7 (0.5) 30 (2.1) 71 (5.0) 21 (1.5)
> 92 μM (%) 1,233 (87.6)
a

See “Materials and Methods” for curve class definitions.