Ritanserin, SB204741 and mesulergine were from Tocris Bioscience. All other ligands were from Sigma-Aldrich. Cell culture reagents were from Invitrogen. PZQ enantiomers ((R)-[-]PZQ and (S)-[+]PZQ) were resolved (Supplementary Fig. 2) using methods published by Woelfle et al.13 (link).
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