A short peptide on complete hydrolysis produces 3 moles of glycine (G), two moles of leucine (L) and two moles of valine (V) per mole of peptide. The number of peptide linkages in it are ______.

On complete hydrolysis, the short peptide produces 3 moles of glycine (G), 2 moles of leucine (L), and 2 moles of valine (V). The total number of amino acid residues in the peptide is $$3 + 2 + 2 = 7$$.

In a peptide chain, each amino acid is joined to the next by a peptide bond. For a peptide with $$n$$ amino acid residues, the number of peptide linkages is $$(n - 1)$$.

So, the answer is $$7 - 1 = 6$$.