Intriguingly, another gene regulated at all time points after injury and after NRG1 stimulation is FXYD domain containing ion transport regulator 5 (Fxyd5), which has been recently shown to be a regeneration-associated gene (RAG), whose over-expression increases (and knock-down decreases) neuritis length and number (Chandran et al., 2016). The gene discussed is FXYD5; the disease is neuritis.