Table 1.

¹⁹F longitudinal relaxation time constants for TET-labeled dicysteine rhodopsin mutants

Mutant	Line, ppm*	T1, sec†
WT	10.6	0.34  ± 0.01
WT	10.0	0.39  ± 0.01
Cys-65–Cys-316	9.7	0.31  ± 0.02
Cys-65–Cys-316	9.2	0.30  ± 0.02
Cys-139–Cys-251	9.8	0.28  ± 0.03
Cys-139–Cys-251	11.1	0.38  ± 0.02

^*Chemical shifts are relative to TFA at 0.0 ppm. 

^† T₁ values and errors were determined by using vnmr 6.1 software.