Two tetrapeptides were isolated from a possum's sweat glands. These peptides were sequenced using Edman degradation and the following 2 sequences were obtained: Gly-Asp-Ala-Leu  Gly-Asp-Asp-Leu  Can you please help show the titration curve for both of these peptides and calculate the PI?

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Two tetrapeptides were isolated from a possum's sweat glands. These peptides were sequenced using Edman degradation and the following 2 sequences were obtained:

Gly-Asp-Ala-Leu 

Gly-Asp-Asp-Leu 

Can you please help show the titration curve for both of these peptides and calculate the PI?

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