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

Table 3

Changes in the kinetic constants ( and ) of LAP by montmorillonite and kaolinite with 10 μmol L^-1 Cd contamination.

	Purified enzyme			Red soil			Purple soil
	PE	PE+M	PE+K	RS	RS+M	RS+K	PS	PS+M	PS+K
	69.11^C	48.59^B	27.63^A	179.00^B	124.42^A	127.37^A	2273.60^B	1964.32^A	1988.37^B
	93.22^b	152.1^b	63.5^a	46.18^b	55.91^c	31.23^a	36.74^a	34.13^a	33.68^a
	0.99	0.99	0.98	0.99	0.99	0.99	0.99	0.99	0.99

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