(Answered) Calculate the pi of the following peptides1 met tyr ser phe

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Calculate the pI of the following peptides:
1. Met, Tyr, Ser, Phe, Gly, Lys, Val

2. Cys-Tyr-Ser-Met-Glu-His-Phe-Arg-Cys-Gly-Lys-Pro-Val

3. Leu - Lys - Val - Ser - Cys - His - Asp - Asp - Phe - Ser - Tyr - Cys - Ile

4. Asp - Asn - Arg - Tyr - His

The primary structure of bovine insulin.
This protein is composed of two polypeptide chains (A and B) joined by disulfide bonds.
The A chain also contains an internal disulfide bond.

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