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Neither is universally "better"-they are related copper peptides with similar roles in collagen and repair

Insulinotropic glucagon-like peptide I receptor expression in glucagon-producing alpha-cells of the rat endocrine pancreas

Graphic abstract Access this article Similar content being viewed by others Notes Ion-pairing arising from relatively high ion concentrations varies with solvent, and thus can strongly influence acid strength in different solvents

Each one is described as more stable or more bioavailable than the last
