For instance, NAD + levels and mitochondrial function have been shown to decline in sarcopenia muscle in one cohort 249 , while another study did not observe a difference in NAD + levels in sarcopenic muscle, and even NR supplementation had no effect on NAD + levels 262
To measure the effect of the paramagnetic label, 1 H, 15 N and 1 H, 13 C HSQC spectra with long inter-scan delays (3 s) of 100 M 13 C/ 15 N-labeled p53 TAD2 in presence of one stoichiometric equivalent paramagnetically labeled FOXO4 FH were recorded before and after addition of 5 mM ascorbic acid
Samples were reconstituted in 3060 l 50% acetonitrile, followed by vortexing for 30 sec, and then centrifuged at 10,000 rpm for 10 min at 4 C
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