Like the Ov GST1, FhGST-S1 does not have this Trp residue and therefore has a longer 4, although the FhGST-S1 helix aligns better to that of the mammalian PGDSs (Fig
Sterile water lacks the bacteriostatic agent, meaning bacteria can begin to grow after the first use, contaminating the entire vial
GHK-Cu is not approved by the FDA for systemic therapeutic use (injection) as a drug
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A practical consequence of this coordination chemistry: any in vitro experiment that adds free GHK to cell culture medium containing serum (and therefore copper bound to albumin and other carrier proteins) is effectively delivering a mixture of free GHK and GHK-Cu, with the equilibrium dependent on copper availability