Table 5.
Chelator | Ca2+ buffering range at pH 7.4 |
Zn2+ buffering range at pH 7.4 |
Zn2+ buffering range at pH 7.4 with competing metal |
---|---|---|---|
EDTA | 0.002 to 0.18 μM | 0.003 to 0.3 pM | |
EGTA | 0.006 to 0.5 μM | 0.15 to 15 nM | 9.7 to 1340 nM (with 2 mM Sr2+) 2 to 134 μM (with 2 mM Ca2+) |
HEDTA | 0.3 to 25 μM | 0.15 to 15 pM | 0.05 to 7.5 nM (with 2 mM Ca2+) |
NTA | 20 to 1670 μM |