TABLE 1.

Surface charge and hydrophobicity of S. oneidensis cells^c

S. oneidensis strain	Zeta potential (mV)a	Affinity to hexadecane (%)b
MR-1 WT	−5.68 ± 1.28	24.0 ± 8.0
CP2-1-S1	−8.96 ± 1.36*	89.0 ± 6.0**

^aMeasured in 0.9% NaCl (pH 7.0).

^bPercentage of cells partitioned into hexadecane.

^cValues are means ± standard deviations (n = 6). Statistical significance of differences (t test): *, P < 0.02; **, P < 0.01.