You may be thinking about some work that was done regarding mutational effects on conformation and expression. (Molecular biologists have known about it for a l

You may be thinking about some work that was done regarding mutational effects on conformation and expression. (Molecular biologists have known about it for a long time, but this was an interesting information-theoretical approach from a group of physicists.) https://www.sciencealert.com/scientists-confirm-a-second-layer-of-information-hiding-in-dna https://www.sciencealert.com/scientists-confirm-a-second-lay...