2.7.4.14 2-mercaptoethanol activates 645143 2.7.4.14 2-mercaptoethanol at 5 mM: reduction in molecular weight from approximately 53000 Da to 17000 Da. This low molecular weight form is partially active in the presence of 2-mercaptoethanol. In absence of 2-mercaptoethanol the low molecular weight form is inactive. At 50 mM: full reactivation of the CMP(ATP) kinase activity followed by dCMP(ATP) and CMP(dCTP) 645142 2.7.4.14 dithiothreitol 1 mM, activates 645149 2.7.4.14 dithiothreitol activates 645143, 645149 2.7.4.14 doxorubicin binding of doxorubicin to the enzyme (CMPK1) activates the phosphorylation of CMP, dCMP, and UMP. Doxorubicin might bind to the nonactive site of CMPK1 and regulate its activity with magnesium 762474 2.7.4.14 glutathione activates 645143 2.7.4.14 L-Cys activates 645143 2.7.4.14 NADPH NADPH-dependent activation system is composed of at least two protein factors: one is heat-stable and the other is indistinguishable from NADPH-dependent disulfide reductase 645144 2.7.4.14 reduced DL-alpha-lipoic acid activates 645143 2.7.4.14 thioredoxin activates 645142