TABLE 2.

Amount of copper bound^a

Prepn	Amt of copper bound (μmol/mg [dry wt] of cells)
	Replicate 1b	Replicate 2	Replicate 3	Mean
P. aeruginosa PAO1 (A+ B+)	0.215 ± 0.025	0.232 ± 0.016	0.206 ± 0.019	0.218 ± 0.013
P. aeruginosa AK1401 (A+ B−)	0.207 ± 0.041	0.214 ± 0.036	0.244 ± 0.047	0.222 ± 0.020
P. aeruginosa dps89 (A− B+)	0.230 ± 0.006	0.203 ± 0.013	0.206 ± 0.028	0.213 ± 0.015
P. aeruginosa rd7513 (A− B−)	0.233 ± 0.037	0.211 ± 0.013	0.213 ± 0.033	0.219 ± 0.012
Acellular controlc	0	0	0	0

^aWhole cells were treated with a 1 mM solution of Cu(NO₃)₂ · 3H₂O for 15 min at 22°C. 

^bData are values from separate measurements of three whole-cell–metal interactions. 

^cAmount of metal which precipitated chemically during the 15-min treatment period.