Enzymes used in PCR. Several types of thermostable DNA polymerases are available for use in PCR, providing a choice of enzymatic properties, see table DNA polymerases used in PCR. Taq DNA polymerase, isolated from the eubacterium Thermus aquaticus, is the most commonly used enzyme for standard end-point PCR.
Symbolic Frame. A collection of media artifacts that represent principles, components, and assumptions of the symbolic/cultural frame. Yes, academics and student achievement are important to any school. However, some school leaders believe that building a school culture is just as important.
Definition of frame of reference. 1  1 : an arbitrary set of axes with reference to which the position or motion of something is described or physical laws are formulated. 2  2 : a set of ideas, conditions, or assumptions that determine how something will be approached, perceived, or understood a Marxian frame of reference.