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Table 3 Effect of metal ion concentration on ginger PGII

From: Purification and characterization of cationic peroxidase from ginger (Zingiber officinale)

Metals% Relative activity (2 mM)% Relative activity (5 mM)
Non100 ± 3.2100 ± 3.4
Ba2+130 ± 3.8180 ± 4.8
Ca2+120 ± 4.2150 ± 5.2
Zn2+110 ± 2.8130 ± 3.3
Mg2+145 ± 4. 3170 ± 4.5
Mn2+125 ± 3.4145 ± 3.5
Ni2+130 ± 4.0145 ± 3.8
Co2+110 ± 2.7130 ± 2.9
Fe2+155 ± 4.4215 ± 5.8
Hg2+65 ± 1.545 ± 1.7
Cu2+22 ± 0.618 ± 0.7
  1. Enzyme was preincubated for 15 min at 37 °C with 2 and 5 mM of listed ions as a final concentration prior to substrate addition. The values are presented as mean ± S.E. (n = 3)