It is also a buffer, which means that it resists pH change.

Such differences are likely due to pH changes or differences in primary structure of the luciferase.

They all can be changed a bit by big pH changes.

This results in a greater pH change and a proportionally greater electronic signal.

If the pH changes, things like this, then watch with a meter.

Halochromism occurs when a substance changes color as the pH changes.

You should see the pH changes in a memorable way.

The 0.1 pH change means there are now 30 percent more hydrogen ions in the water.

It would be difficult to establish a biological origin without first showing that a pH change caused didn't cause your observations.

Conversely, when you know you are in a part of a curve where pH changes slowly, using larger additions can save time.