Debris from Total Hip Replacement or Hip Resurfacing Procedures. After total hip replacement or hip resurfacing, particle debris from the cup, ball or ball covering can lead to complications and implant failure. As the implant recipient moves, the surfaces of the components rub against each other. The friction and abrasive wear between the components produces debris.
Reverse transcriptase is the viral enzyme responsible for making a DNA copy of the RNA genome from a retrovirus. As such, it is technically known as an RNA-dependent DNA polymerase. This is opposite to the usual flow of genetic information from DNA to RNA to protein.
Key Concepts. Enzymes catalyze reactions by lowering the activation energy necessary for a reaction to occur. The molecule that an enzyme acts on is called the substrate. In an enzyme-mediated reaction, substrate molecules are changed, and product is formed.The enzyme molecule is unchanged after the reaction, and it can continue to catalyze the same type of reaction over and over.nzymes catalyze reactions by lowering the activation energy necessary for a reaction to occur. The molecule that an enzyme acts on is called the substrate.