Question: please explain step by step. and show all the work please. 1. a) Draw the structure of the tetrapeptide GIRL at a pH of 7.0.

please explain step by step. and show all the work please.

1. a) Draw the structure of the tetrapeptide GIRL at a pH of 7.0. What is the overall charge on the tetrapeptide at pH 7.0? b) What is the charge of the peptide above at pH 10? c) What is the charge of the peptide above at pH 2? d) What is the charge of the peptide above at pH 13? c) Calculate the approximate pl of the tetrapeptide

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