Fig. 4. Decarboxylase inhibitor NSD-1015 (10 µM) significantly attenuated the
retarding effect of CW in both Helisoma (A) and Lymnaea (B).
When added together with 1 mM 5-HTP in Helisoma (C) or 1 mM L-DOPA in
Lymnaea (D), NSD-1015 also attenuated their effects.