BioScience Dictionary

 
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Found Thymidine kinase 1 time.

Displaying results 1 to 10.

1. Thymidine kinase (tk)
An enzyme which plays an important role in the making of TTP from thymine - the only way thymine, cytosine , and other pyrimidine molecules are able to become part of nucleic acid s. Biologists study gene action via the incorporation of modified nitrogenous base s into DNA by manipulating the metabolic role which this enzyme plays. Similarly, the enzyme hypoxanthine-guanine phosphoribosyl transferase is used for the same purpose by biologists because it fills the same important and unique role for the purine s ( guanine , adenine , etc.). Thymidine kinase is also used as a selectable marker to identify transfect ed eukaryotic cell s.