. "Cytosolic thymidine phosphorylase (TYMP) catalyzes the reversible reactions of thymidine or deoxyuridine with orthophosphate to form thymine or uracil and 2-deoxy-D-ribose 1-phosphate. The active form of the enzyme is a homodimer (Desgranges et al. 1981; Norman et al. 2004; Usuki et al. 1992)."^^ . . . . . . . . "thymidine or deoxyuridine + orthophosphate <=> thymine or uracil + 2-deoxy-D-ribose 1-phosphate [TYMP]"^^ . "2.4.2"^^ . . . . .