TABLE 1.

CPC and CMC values of RP437 and RP437 Δtar cells for concentration gradients of different chemoeffectors^b

Signal(s)	Concn gradient (μM)	Mean CPC ± SD	Mean CMC ± SD
No signal (blank)	0-0	0.03 ± 0.01	−0.01 ± 0.01
Null gradient (l-aspartic acid)	100-100	−0.01 ± 0.01	−0.01 ± 0.01
l-Aspartic acid	0-100	0.33 ± 0.05	0.13 ± 0.03
l-Aspartic acida	0-100	0.02 ± 0.02	0.01 ± 0.01
Nickel sulfate	0-225	−0.34 ± 0.04	−0.14 ± 0.03
Nickel sulfatea	0-225	−0.07 ± 0.03	−0.05 ± 0.02
AI-2	0-500	0.28 ± 0.05	0.11 ± 0.02
DMSO solvent	0-500	−0.01 ± 0.01	0.01 ± 0.01
Indole	0-500	−0.35 ± 0.03	−0.15 ± 0.02
Isatin	0-250	0.21 ± 0.05	0.09 ± 0.01
Indole + AI-2	0-500/0-500	0.19 ± 0.03	0.08 ± 0.02

^aRP437 eda⁺ Δtar.

^bMean values and standard deviations for data from 100 images per experiment over three independent experiments are shown.