https://www.nature.com/articles/s42005-022-00881-8

Background information:

The energy requirements that prevent chemical reactions from happening can be seen as barriers that a particle needs to cross in order for a chemical reaction to happen. Classical mechanisms therefore require a lot of energy to be put into a reaction for it to occur. In the quantum mechanism of tunneling however, particles may appear on the other side of a barrier without having had sufficient energy to cross it. Smaller particles such as photons are able to tunnel more easily than larger particles such as electrons. However, even larger particles such as protons also appear to be capable of tunneling. For example, it is believed that enzymes in the human body rely on proton tunneling in order to break down and combine essential molecules.

See: https://www.reed.edu/reed-magazine/articles/2018/bowring-proton.html