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Identidad y composicin GHK-Cu ( Glicil-L-Histidil-L-Lisina ion Cobre(II) ) es un complejo tripptido-cobre de masa molecular 340.85 Da, formado por la secuencia tripeptdica GHK (Gly-His-Lys) unida covalentemente a un ion cobre divalente Cu con alta afinidad (constante de disociacin Kd ~10 M)

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