ABCB7 and Hyperkalemia: Finally, at the age of 8–12 weeks, Uqcrh−/− mice showed hypoproteinaemia, hypoalbuminemia, hyperkalaemia, increased activities of liver marker enzymes (ALAT, ASAT), hyperphosphatasaemia (increased ALP), decreased calculated total iron‐binding capacity (TIBC) and strong hyperglycaemia (Appendix Table S2).