Fig. 1: Basal resistance and ISC levels in the transverse colon from untreated and MPTP-treated common marmosets.

a Basal resistance; b short circuit current (ISC). Values are mean ± SEM from 4 or 5 specimens, as shown in parenthesis (n = 4 MPTP and n = 5 control). +P ≤ 0.05 compared to untreated animals (Student’s t-test).