Some proteins undergo post-translational modification once they’re made: some of the amino acids may be chemically altered, a sugar may be added, the protein may be cleaved in a certain way, etc.. ..

We needn’t delve into those details right now—your Old Quantum Butcher is pleased and proud that you’ve stayed with him this far. But it’s a great ride, isn’t it? From start to finish, you’ve taken a trip with information as it flows through a living system. With the protein made, we’ve reached the end of the line (according to the Central Dogma, that is). A gene, buried in a chromosome in the depths of the nucleus, has found expression as a working protein.