Well, it was discovered that one of the tricks that enzymes have evolved to make use of, is by transferring subatomic particles, like electrons and indeed protons, from one part of a molecule to another via quantum tunneling.
Man fand heraus, dass einer der von Enzymen entwickelten Tricks ist, subatomare Teilchen wie Elektronen und sogar Protonen per Tunneleffekt von einem Teil des Moleküls zum anderen zu bringen.