TABLE 1.

Pd²⁺ removal from resting cell suspensions

Cell treatment	Rate of Pd2+ removal (nmol min−1 mg of protein−1)a
	0.5 mM Pd2+		2.0 mM Pd2+
	I	II	I	II
N2 sparged	79.4	85.5	168.5	201.0
Air sparged	67.8	75.6	168.5	208.0

^a D. desulfuricans was grown and resuspended in solutions supplemented with 0.5 or 2.0 mM Pd²⁺, as described in the text. I and II are independent experiments using separate batches of cells. Losses in activity: I (0.5 mM Pd²⁺), 15%; II (0.5 mM Pd²⁺), 12%; I (2.0 mM Pd²⁺), 0%; II (2.0 mM Pd²⁺), 0%.