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Is GHK-Cu suitable for use in cellular studies and biochemical assays

When the serum was diluted 200-fold, the acceptable recovery rate ranged from 90.75% to 133.56% with the RSD values being less than 4% (Table 1)

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LY294002 and SP600125 were from EMD (Gibbstown, NJ, USA) Western blot analysis The antibodies used for western blotting included those against stress-activated protein kinase (SAPK)/JNK, phospho-SAPK/JNK (Thr183/Tyr185), caspase-7, caspase-9, phospho-Bcl-2 (Ser70), and poly(ADP-ribose) polymerase (PARP) (Cell Signaling Technology, Danvers, MA, USA), cytochrome c and -actin (Sigma, St Louis, MO, USA), cytochrome oxidase subunit IV (Cox IV