Table 1.

UV-Vis Spectroscopy: UV-vis spectral parameters of ROS, WT, and I307N mutant Rhos, with and without VPA treatment, in the dark state.

	ROS	ROS-VPA	WT	WT–VPA	I307N	I307N-VPA
λmax (nm)	500	501	500	497	500	497
A280/Aλmax	1.90 ± 0.10	2.83 ± 0.20	2.22 ± 0.20	2.89 ± 0.20	2.55 ± 0.30	3.02 ± 0.30
ε × 103 (M−1·cm−1)	42.7 ± 1.1	37.6 ± 1.8	43.2 ± 0.6	37.5 ± 2.2	43.8 ± 0.3	37.8 ± 2.5