How proteins evolved the ability to form complexes made up of multiple subunits—and what functions this new structure enabled in early multimeric proteins—isn’t well understood. To better understand ...

The tangled mass of tubing, disks and light bulbs unveiled before a packed meeting of the Royal Society of scientists in London looked for all the world like an outsize example of abstract sculpture.

Iron and oxygen work hand in hand to keep your body energized and alive. Iron forms the core of hemoglobin, the protein that carries oxygen from your lungs to every cell. Understanding how your body ...

Your red blood cells are tiny couriers, carrying life-sustaining oxygen from your lungs to every cell and bringing back carbon dioxide for release. Hemoglobin, the iron-rich protein inside them, makes ...

Hemoglobin is an iron-rich protein in red blood cells that enables the blood to carry oxygen to tissues throughout the body. Low hemoglobin levels often indicate anemia, but high levels can also be a ...