title: Activity of thymidine kinase during the cell cycle in Tetrahymena pyriformis.
abstract: The presence of thymidine kinase has recently been reported in Tetrahymena pyriformis. The activity pattern for this enzyme was investigated during the cell cycle in both the one heat-shock per cell generation and the starvation-refeed system. Thymidine kinase was found to be a peak enzyme during S-phase in both situations. Nucleoside phosphotransferase was a continuous enzyme in the one heat-shock per cycle system, however, it closely paralleled the thymidine kinase curve during starvation and refeeding.
mesh_terms: D000818:Animals; D002453:Cell Cycle; D006358:Hot Temperature; D010770:Phosphotransferases / Q000378:metabolism; D013769:Tetrahymena pyriformis / Q000166:cytology / Q000201:enzymology*; D013937:Thymidine Kinase / Q000378:metabolism*
chemical_list: D010770:Phosphotransferases; D013937:Thymidine Kinase