This information is used to determine the density of the air entering the combustion chamber (in conjunction with the IAT (Intake Air temperature) sensor), which is used when calculating the proper air/fuel mixture for the engine, especially at WOT since the system is not in closed-loop at this time.
The TTR gene provides instructions for producing a protein called transthyretin. This protein transports vitamin A (retinol) and a hormone called thyroxine throughout the body. To transport thyroxine, four transthyretin proteins must be attached (bound) to each other to form a four-protein unit (tetramer).
Actin is the main protein of the thin filament. A second protein, called troponin, is found at intervals. When Ca++ binds to troponin, this allows myosin heads to bind to the actin of the thin filament, creating cross bridges. The cross bridges then pull on the thin filaments, causing the sarcomere to shorten.