In this reaction, all reactants and products are invisible. The heat being evolved is the clue that tells you a reaction is taking place. This is a good example of an exothermic reaction, a reaction in which heat is given off. A lot of reactions are exothermic.
Prothrombinase will cleave prothrombin to make thrombin and thrombin is the enzyme that cuts fibrinogen to make fibrin for clot formation [Blood Clotting: The Basics]. The platelet prothrombinase activity is the same as the activity on TP-bearing cells: itâs formed from Xa and membrane-bound Va.
For the RNA Polymerase, see RNA polymerase II. DNA polymerase II (also known as DNA Pol II or Pol II) is a prokaryotic DNA-Dependent DNA polymerase encoded by the PolB gene. DNA Polymerase II is an 89.9-kDa protein and is a member of the B family of DNA polymerases.It was originally isolated by Thomas Kornberg in 1970, and characterized over the next few years.NA Pol II is not the most studied polymerase so there are many proposed functions of this enzyme which are all likely functions but are ultimately unconfirmed. These are: repair of DNA damaged by UV irradiation, replication restart in UV-irradiated E. coli, adaptive mutagenesis, and long-term survival.