Table 2.

Kinetics table comparing the 1/α, sensitivity, and C_1/2 for organisms

Organism	C1/2 (μM)	1/α (μM)
L. lactis	0.86 ± 0.03	0.21 ± 0.04
M. tuberculosis	0.86 ± 0.25	0.24 ± 0.11
E. coli	2.31 ± 0.14	0.68 ± 0.19

Data are means ± se. Sensitivity indicates the amount of LPC required for an e-fold change in calcein release, and C_1/2 indicates the LPC concentration at which 50% of the final release occurs, derived by fitting with the Boltzmann function. These parameters correlate directly with channel activity.