A biochemist wants to utilize the following oligopeptide for biochemical assays. Estimate the number of charges on this peptide at different pH conditions by considering the charge states of amino acid residues at pH 2, pH 7.4 and pH 10.
Met-Leu-Asp-Gly-Lys-His-Tyr-Arg-Cys-Ser
Based on the number of charges at physiological pH (7.4) would it be acidic or basic peptide?