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).
Transamination (or aminotransfer) is a chemical reaction that replaces an amine functional group with another amine. In many applications, an amino acid is the substrate. The other substrate is a keto acid, which contains a keto (=O) group. In transamination, the NH 2 group on one molecule is exchanged with the =O group on the other. The original amino acid converts to a keto acid, and the keto acid converts to an amino acid. Transamination in biochemistry is accomplished by enzymes called transaminases or aminotransferases.