In anger, she questions what is wrong with her lock and key. Alfred, the science app, responds by explaining how enzymes work in relation to the ‘lock and key’ model.

In anger, she questions what is wrong with her lock and key. Alfred, the science app, responds by explaining how enzymes work in relation to the ‘lock and key’ model.

But new work shows that shape complementarity — the construction of colloids using a lock-and-key recognition mechanism — offers a simple and effective alternative control mechanism.