[dekhn]

Magnetism does not play a role in binding in biology. The primary determinants of binding are: shape complementarity, electrostatic interactions, van der waals forces, and some amount of hard to explain entropy.

(biomagnetism is a thing, but I'm not aware of any cases where binding occurs due to magnetic forces)

[aeonik]

I think they might have meant they are all geometrically defined EM interactions.