Additional file 9.

Mass spectra of the two candidate metabolites likely involved in brain manipulation byO. unilateralis s.l.identified in this study. (A) Mirror image of the guanidinobutyric acid found in O. unilateralis s.l.-C. castaneus brain interaction samples and a standard for 4-guanidinobutyric acid (CAS 463-00-3, Sigma Aldrich) at a concentration of 50 μg/mL (in red). (B) Mirror image of the identified sphingosine found in O. unilateralis s.l.-C. castaneus brain interaction samples and a standard for L-threo-sphingosine C-18 (CAS 25695-95-8, Cayman Chemical) at a concentration of 1 μg/mL (in red).

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de Bekker et al. BMC Evolutionary Biology 2014 14:166   doi:10.1186/s12862-014-0166-3