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ERK1 and ERK2 (ERK1/2) are central to the regulation of cell division, growth and survival. They are activated by phosphorylation of the Thr- and the Tyr- residues in their Thr-Glu-Tyr activation loops. The dogma is that dually-phosphorylated ERK1/2 constitute the principal activities in intact cells. We previously showed that, in neonatal rat cardiac myocytes, endothelin-1 and phorbol 12-myristate...
(S,S)-Isodideoxyadenosine [(S,S)-isoddA] is an anti-HIV active compound discovered in our laboratory. However, its cellular mechanism of action, particularly the critical first stage of phosphorylation, is not understood. IsoddA is not phosphorylated by adenosine kinase. Also, because it is not a substrate for adenosine deaminase, it would not be activated by the pathway taken by ddA, i.e. via 5'-nucleotidase...
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