Copper deficiency upregulates the gene ferritin light chain.

“only one gene fired up it's called ferian light chain and that's the that's the gene that runs iron storage in the liver and the Spen and Fittin light chain is very different than Fittin heavy chain because heavy chain requires copper light chain not so much and so the what they were able to prove in 2021 is that Hart at all and mcar at all were absolutely right back in 1928 but they were able to prove it genetically that there is an obligate response genetically to a low copper environment that forces higher much higher expression of fer and light chain which then enables the iron storage to take place”