"Phosphorus is a key element in all known forms of life. Inorganic phosphorus in the form of the phosphate PO43– plays a major role in biological molecules such

"Phosphorus is a key element in all known forms of life. Inorganic phosphorus in the form of the phosphate PO43– plays a major role in biological molecules such as DNA and RNA where it forms part of the structural framework of these molecules. Living cells also use phosphate to transport cellular energy in the form of adenosine triphosphate (ATP). Nearly every cellular process that uses energy obtains it in the form of ATP. ATP is also important for phosphorylation, a key regulatory event in cells. Phospholipids are the main structural components of all cellular membranes. Calcium phosphate salts assist in stiffening bones." http://en.wikipedia.org/wiki/Phosphorus#Biological_role http://en.wikipedia.org/wiki/Phosphorus#Biological_role