Table I.

Spectral properties of the various LOV-domain fusion proteins

Construct	Wavelength of Peak	Extinction at Peak Wavelength	Kppr (× 102)	Photoproduct at Photoequilibrium	Relative Quantum Efficiencya
	nm	1 mol−1 cm−1	s−1	%
Atb phot1 LOV1	448.5	13,900	0.38	37	0.035
At phot1 LOV2	446.5	14,300	3.9	91	0.34
At phot1 LOV1+2	447.5	13,700	1.9	55
At phot2 LOV1	447.5	14,700	1.5	62	0.13
At phot2 LOV2	445.5	13,500	2.9	52	0.27
At phot2 LOV1+2	446.5	13,400	2.4	55
Os phot1 LOV1	449.5	11,200	0.23	33	0.026
Os phot1 LOV2	446.5	15,200	3.7	87	0.30
Os phot1 LOV1+2	448.0	11,800	1.6	41
Os phot2 LOV1	448.0	11,100	2.9	83	0.33
Os phot2 LOV2	446.5	13,300	3.1	81	0.29
Os phot2 LOV1+2	447.0	13,300	2.9	77
Cr LOV1	447.0	13,800	3.3	73	0.30
Cr LOV2	445.5	13,300	3.7	69	0.35
Cr LOV1+2	446.5	13,200	3.6	75

^aApproximate efficiencies (Q) were calculated from the equation Q = K_ppf ε⁻¹ I⁻¹, where K_ppf is the initial rate of photoproduct formation in s⁻¹, ε is the molar extinction coefficient in 1 mol⁻¹ cm⁻¹, and I is the fluence rate of the actinic light in μmol m⁻² s⁻¹. 

^bAt, Arabidopsis; Os, rice; Cr, C. reinhardtii.