Table 2.

Anion transmembrane transport facilitated by 1a-d and prodigiosin.

Compound	NO3−/Cl− (a)		HCO3−/Cl− (b)		Initial quenching rate(c) (s−1)
	EC50 (nM)	Hill’s coefficient	EC50 (nM)	Hill’s coefficient
1a	24	1.39	1911	0.94	0.009
1b	30	1.27	2609	0.72	0.008
1c	18	1.17	1617	0.65	0.020
1d	50	1.43	42783	0.63	0.007
prodigiosin	2	1.13	58	0.91	0.079

^aLUV loaded with 489 mM NaCl dispersed in 489 mM NaNO₃ (5 mM phosphate buffer, pH 7.2). ^bLUV loaded with 451 mM NaCl dispersed in 150 mM Na₂SO₄ (20 mM phosphate buffer, pH 7.2) upon addition of a NaHCO₃ pulse to make the external bicarbonate concentration 40 mM. ^cLUV loaded with 102.2 mM NaNO₃ dispersed in 102.2 mM NaNO₃ (20 mM phosphate buffer, pH 7.2) upon addition of a NaCl pulse to make the external chloride concentration 10 mM.