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: A person, place, action, word, or thing that (by association, resemblance, or convention) represents something other than itself. Verb: symbolize. Adjective: symbolic.In the broadest sense of the term, all words are symbols.(See also sign .) In a literary sense, says William Harmon, a symbol combines a literal and sensuous quality with an abstract or suggestive aspect (A Handbook to Literature, 2006). In language studies, symbol is sometimes used as another term for logograph. In Poe's 'The Raven,' death isn't the symbol; the bird is. 2  In Crane's The Red Badge of Courage, courage isn't the symbol; blood is. 3  Symbols are usually objects, but actions can also work as symbols--thus the term 'symbolic gesture.'.  4 A symbol means more than itself, but first it means itself.