abnormal ion homeostasis abnormal mineral homeostasis abnormal iron homeostasis MP:0005637 MPheno.ontology anomaly in the processes involved in the maintenance of an internal equilibrium of iron that normally is a cofactor in the heme of hemoglobin, myoglobin, transferrin, ferritin, and iron-containing porphyrins; it is an essential component of enzymes such as catalase, peroxidase, and various cytochromes