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Ribonucleotide reductase in mammalian cells is composed of two nonidentical subunits, proteins M1 and M2. Protein M2 contains a tyrosyl free radical, essential for activity, which can be quantified(More)
Thymidine kinase 1 (TK1) is converting thymidine to thymidine monophosphate, and is related to DNA replication and cell proliferation. The use of the TK1 protein levels as a proliferation marker in(More)