title: Human liver thymidine kinase. Purification and some properties of the enzyme.
abstract: Thymidine kinase (EC 2.7.1.21) has been purified 5600-fold to apparent homogeneity from normal adult human liver. The purification included affinity chromatography on a thymidine column. The subunit molecular weight of the enzyme obtained from this purification was 48,000, and human liver thymidine kinase exhibited association and dissociation. The smallest native molecular form had a molecular weight as determined by gel filtration of 49,000 and the enzyme consistently associated into forms with a molecular weight of 98,000 and 340,000. With isoelectric focusing, the enzyme demonstrated a single form with an isoelectric point of 5.1.
mesh_terms: D000818:Animals; D006801:Humans; D007700:Kinetics; D008099:Liver / Q000201:enzymology*; D046911:Macromolecular Substances; D051379:Mice; D008970:Molecular Weight; D011487:Protein Conformation; D013937:Thymidine Kinase / Q000302:isolation & purification* / Q000378:metabolism
chemical_list: D046911:Macromolecular Substances; D013937:Thymidine Kinase