When green algae run out of air: Single cell organisms need haemoglobin to survive in an oxygen-free environment

When green algae "can't breathe," they get rid of excess energy through the production of hydrogen. Biologists have found out how the cells notice the absence of oxygen. For this, they need the messenger molecule nitric oxide and the protein haemoglobin, which is commonly known from red blood cells of humans.

Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/W...