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Description
The lyophilized powder for GHK-Cu often appears off-white to pale blue depending on copper content and supplier process

In the GHK-Cu complex, the Cu (II) ion is coordinated by the nitrogen from the imidazole side chain of the histidine, another nitrogen from the alpha-amino group of glycine, and the deprotonated amide nitrogen of the glycine-histidine peptide bond (Figure 1)

10.3892/mmr.2023.13108 107 ZhangZ.WangZ.CuiY.YaoM.LuJ.HeM.et al (2026)

Conclusion Glutamine metabolism plays a crucial role in cancer cells and immune cells like T cells
