The Shrinking Transistor

How big are modern transistors? Surely they must be much bigger than an enzyme? Well, not quite. The picture below shows two transistors, both about 22 nm wide. Superimposed on top of the right-hand transistor is a single molecule of phosphofructokinase.

Transistor image from Tech-On
Image of phosphofructorkinase from Molecule of the Month PDB

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