The gene HAMP expresses the protein that regulates the homeostasis of this element in mammals, known as hepcidin.
A compound with a high affinity for this element named yersiniabactin is produced by Yersinia pestis. In core-collapse supernovae, the r- and s- processes are used to produce nuclei heavier than this element. One solution used to purify waste water consists of hydrogen peroxide and a catalyst of this element, known as Fenton's reagent. Though not aluminum, a chloride of this element is commonly used as a catalyst for Friedel-Crafts reactions. The gene HAMP expresses the protein that regulates the homeostasis of this element in mammals, known as hepcidin. One alloy of this element can undergo martensite, bainite and pearlite phase transitions. Meat's red color and our blood's ability to transport oxygen are both mediated by proteins containing this element. For 10 points, what is this transition element with symbol Fe?
A compound with a high affinity for this element named yersiniabactin is produced by Yersinia pestis.
iron [accept Fe until mentioned]