Table 1 Monovalent cation effects. Samples were pre-incubated with various concentrations of chloride salts of the monovalent cations and then assayed using the standard procedure. Reported values and standard errors are triplicate absorbances at 555 nm.
From: Rhodobacter capsulatus porphobilinogen synthase, a high activity metal ion independent hexamer
| Â | Concentration of Salt (mM) | |||||
|---|---|---|---|---|---|---|
| Â | 0 | 1 | 5 | 10 | 50 | 100 |
KCl | 0.270 ± 0.019 | 0.268 ± 0.006 | 0.271 ± 0.002 | 0.261 ± 0.007 | 0.269 ± 0.003 | 0.310 ± 0.014 |
NaCl | 0.302 ± 0.006 | 0.294 ± 0.017 | 0.292 ± 0.002 | 0.276 ± 0.012 | 0.262 ± 0.003 | 0.268 ± 0.003 |
NH4Cl | 0.297 ± 0.022 | 0.278 ± 0.004 | 0.279 ± 0.009 | 0.225 ± 0.001 | 0.224 ± 0.009 | 0.220 ± 0.005 |