{"shapes": [{"geometry": {"y": 0.09714285714285714, "x": 0.8876146788990825, "width": 0.0986238532110092, "height": 0.07428571428571429}, "type": "rect"}], "src": "http://images.sciencedaily.com/2014/06/140601150643-large.jpg", "context": "http://app.swtr.us/", "text": "A new hormone called erythroferrone, which regulates the iron supply needed for red blood-cell production, has been discovered by researchers. Iron is an essential functional component of hemoglobin. Using a mouse model, researchers found that erythroferrone is made by red blood-cell progenitors in the bone marrow in order to match iron supply with the demands of red blood-cell production. Erythroferrone is greatly increased when red blood-cell production is stimulated, such as after bleeding or in response to anemia."}