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. Author manuscript; available in PMC: 2016 Mar 1.
Published in final edited form as: Pharmacol Biochem Behav. 2015 Jan 3;130:1–8. doi: 10.1016/j.pbb.2014.12.013

Figure 2. ED50 values following chronic nicotine treatment for mice differing in β4 genotype.

Figure 2

Mean ± SEM of ED50 values calculated by non-linear least squares curve fits for dose-response curves from each of the four tests for β4++, β4+− and β4−− that had been chronically treated with the indicated doses of nicotine.