Every enzyme has a place in which the molecule fits exactly. This is known as the active site. The active site of the catalase allows the hydrogen peroxide molecule to fit exactly. You could say ...

"MS-QuantEXAFS not only helps identify the active sites, but also quantifies the percentage of a specific site and automates the entire data analysis process," she said.

Enzymes have active sites which only match specific substrates. The diagram shows how this works. In this example, the enzyme splits one molecule into two smaller ones, but other enzymes join ...