Fig. 6. In-cell n-FABS assay for FAAH. (A) n-FABS assay setup for FAAH where a fluorinated natural substrate analogue, ARN1203, is cleaved in the presence of hFAAH to a traceable fluorinated product (B) ¹⁹F NMR spectra of intact HEK293 cells (control) and intact transfected HEK293 cells with ARN1203 (adapted from ref. 18 with permission from Springer, copyright 2020).