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A Dermatologist's Take on the Copper Peptide (GHK-Cu) Trend Pack Size:20's Vitamin Form_Vitamin Patch https://3dlifestyle.pk/wp-content/uploads/2025/08/Skin-Whitening-Injections-.png To investigate whether VRK2 directly phosphorylates Sec24C, we carried out an in vitro kinase assay and found that overexpression of VRK2 was able to increase the phosphorylation level of Sec24C