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Table 1 Effect of metal ions on lytic activity of EDTA-treated LysB4

From: Characterization of LysB4, an endolysin from the Bacillus cereus-infecting bacteriophage B4

  Relative lytic activity (%)
Untreated 100
5 mM EDTA 8.5 ± 0.2
Metal ions 0.1 mM 1.0 mM
Zn2+ 104 ± 2.8 Not available
Mn2+ 89.5 ± 17.6 96 ± 8.4
Ca2+ 34.5 ± 12.0 90 ± 11.3
Mg2+ 32 ± 9.8 90.2 ± 9.6
Hg2+ 8.3 ± 2.5 Not available
Cu2+ 17.2 ± 5.9 12.5 ± 0.7
  1. Relative lytic activities were measured by comparing the lytic activity of tests with it of LysB4 that was not treated with EDTA initially (Untreated). Values represent the mean ± standard deviation (n = 3).