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A sample of an unknown peptide undergoes a single round of Edman degredation, wh

ID: 273427 • Letter: A

Question

A sample of an unknown peptide undergoes a single round of Edman degredation, which liberates ATZ-Gly. Another sample of the peptide is treated with trypsin, and a third sample is treated with chymotrypsin. The table below shows the fragments. Complete parts (a) and (b) below.

The first half was marked as correct, but what's wrong with the second part?

A sample of an unknown peptide undergoes a single round of Edman degradation, which liberates ATZ-Gly. Another sample of the peptide is treated with trypsin, and a third sample is treated with chymotrypsin. The table below shows the fragments. Complete parts (a) and (b) below Tryptic fragments Trp-Ser Gly-Asp-Trp-Arg Asn-Tyr-Ala-Val-Thr-Cys-Asn-GIn-Lys Ser Arg-Asn-Tyr Ala-Val-Thr-Cys-Asn-GIn-Lys-Trp Gly-Asp-Trp a) Line up the fragments below so that fragments with the same sequences overlap. Drag each fragment to the appropriate location. Gly-Asp-Trp Gly-Asp-Trp-Arg Arg-Asn-Tyr Asn-Tyr-Ala-Val-Thr-Cys-Asn-GIn-Lys Ala-Val-Thr-Cys-Asn-GIn-Lys-Trp Trp-Ser Ser

Explanation / Answer

The wrong sequence written by you corrected and highlighted by bold(Gin to Gln)

Gly-Asp-Trp-Arg-Asn-Tyr-Ala-Val-Thr-Cys-Asn-Gln-Lys-Trp-Ser

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