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Fig. 7. Synergic effects of 107 mol l1
tryptamine (Trypt) and other drugs such as acetylcholine (Ach,
103 mol l1), dopamine (Dop,
104 mol l1) and taurine (Taur,
103 mol l1) on maximal light emission
(Lmax) of O. californica. Values (means ±
S.E.M.) are expressed as a percentage of
photogenesis triggered by 200 mmol l1 KCl in normal
artificial seawater. **P<0.01 in comparison to
107 mol l1 tryptamine on its own;
N=8 stimulated aliquot parts per treatment.