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Table 2 Effects of different metal ions on the activity of stingray PLA2

From: Proteolytic cleavage of stingray phospholipase A2: Isolation and biochemical characterization of an active N-terminal form

Ions PLA2 Activity (%)
  0 mM Ca2+ 1 mM Ca2+
Mg 2+ 3.5 ± 1.1 60 ± 5.4
Mn 2+ 2 ± 1 57 ± 2.2
Zn 2+ 3 ± 0.5 15 ± 2.4
Cd 2+ 2 ± 0.8 12 ± 1.8
  1. Influence of ions concentrations (10 mM each) on SPLA2 activity in the absence or presence of 1 mM Ca2+ was studied using PC emulsion as substrate at 40°C and pH8.5. The control represents 100% of PLA2 activity at 8 mM Ca2+ under the same condition. Values represent the mean of three replicates.