Almost nothing was previously known about how the four-subunit (tetrameric) form of haemoglobin that is found in modern-day jawed vertebrates evolved from ancient monomers. Tetrameric haemoglobin ...

Textbooks have said for decades that haemoglobin is found in the red blood cells (RBCs), that it makes blood red, carries oxygen, and is essential for our survival. A new and serendipitous discovery ...