By Lynn Yarris – The cellular signaling networks of living cells start with receptor proteins residing on a cell’s surface that detect and interact with the environment. Signals from these receptors are transmitted to chemical networks within the cell that process the incoming information, make decisions, and direct subsequent cellular activities.
“Although cellular signaling networks perform logical operations like a computer microprocessor, they do not operate in the same way,” Jay Groves, a chemist with Berkeley Lab’s Physical Biosciences Division and UC Berkeley’s Chemistry Department, says. “The individual computational steps in a standard computer are deterministic; the outcome is determined by the inputs. For the chemical reactions that compose a cellular signaling network, however, the molecular level outcomes are defined by probabilities only. This means that the same input can lead to different outcomes.” more> http://tinyurl.com/osa5jj9