Follow your curiosity

What discovery has been shared with you?

FACTREE gives you something interesting to discover every day — and something worth talking about together.

Start with one fact. Explore it, go deeper, then follow whichever branch catches your imagination.

Choose subjects for a surprise

Exploring any topic

Begin your discovery

Your next discovery is one click away.

Choose one or more subjects above, or leave Any Topic selected and let curiosity decide.

Chemistry

How to Interpret MALDI-TOF Mass Spectra for Biomolecule Analysis

Quick fact

In MALDI-TOF, molecules are usually ionized by adding a single proton, so the mass-to-charge ratio (m/z) is essentially the intact molecular mass, unlike ESI which yields multiple charge states.

Why this is interesting

You may have seen a mass spectrum of a protein with a single dominant peak, but did you know that each peak’s position tells you the exact mass of the molecule?