Clay Minerals Change the Toxic Effect of Cadmium on the Activities of Leucine Aminopeptidase

Table 2

Changes in the kinetic constants ( and ) of LAP by montmorillonite and kaolinite.

	Purified LAP			Red soil			Purple soil
	PE	PE+M	PE+K	RS	RS+M	RS+K	PS	PS+M	PS+K
	104.05^A	97.73^A	119.1^A	257.18^A	253.65^A	235.26^A	3312.61^B	2898.44^A	3226.65^B
	26.42^a	34.34^b	31.74^ab	36.92^a	72.02^b	35.09^a	38.13^a	40.44^a	36.79^a
	0.99	0.99	0.97	0.99	0.96	0.99	0.99	0.98	0.99

PE means purified enzyme (LAP), RS means red soil, PS means purple soil, and +M or +K means adding montmorillonite or kaolinite.