Table 2.

Free concentrations of Zn2+ and Cu2+ in 10 mM Tricine

Zn2+ Added, µM 9.7 100 900   
 Free, µM 0.08 0.8   
Cu2+ Added, µM 30 100 269 616 1,100 
 Free, nM 13 45 123 293 551 

Free concentrations were calculated using the Solver function in the MaxChelator program. Calculations took into account the presence of 1 mM Ca2+, ionic strength (0.15 M), and pH (7.4).

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