Proceedings of the National Academy of Sciences of the United States of America PNAS is the world's most-cited multidisciplinary scientific serial. It publishes high-impact research reports, ...

Haemoglobin is a paradigm for exploring allosteric regulation, wherein ligand binding at one site induces conformational changes that affect functional activity at a distant site. These structural ...

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 ...

Red-blooded genealogists take note: The discovery in microbes of two oxygen-packing proteins, the earliest known ancestors to hemoglobin, brings scientists closer to identifying the earliest life ...

This is a preview. Log in through your library . Abstract The contribution of the porphyrin skeleton to the potential energy surface of metalloporphyrins is calculated by the semiempirical method of ...

The crocodilian edition of hemoglobins -- the scuba tanks of the blood -- work so well that crocs can go hours without air. The hyper-efficiency of that adaptation has led some biologists to wonder ...

Hemoglobin helps red blood cells carry oxygen to your muscles and tissues. Abnormal hemoglobin levels can be a sign of several health problems. Hemoglobin is a component of your blood that delivers ...

ARLINGTON, Va.– Red-blooded genealogists take note: The discovery in microbes of two oxygen-packing proteins, the earliest known ancestors to hemoglobin, brings scientists closer to identifying the ...