Funding for this research was provided by:
Medical Research Council (MC_UP_1201/22)
First Online: 26 February 2021
Change Date: 23 April 2021
Change Type: Clarification
Change Details: Editor’s Note: The editors of Nature Methods wish to alert readers that the Article “A fast, high-affinity fluorescent serotonin biosensor engineered from a tick lipocalin” by Zhang, S. et al., (Nat Methods 18, 258–261 (2021), doi:10.1038/s41592-021-01078-7) on which this News and Views was based has been retracted. Comments in this News and Views that rely on the accuracy and reproducibility of this data should therefore be reconsidered.
: The authors declare no competing interests.