Fundamentals of Biochemistry: Life at the Molecular Level 5th Edition

Published by Wiley
ISBN 10: 1118918401
ISBN 13: 978-1-11891-840-1

Chapter 5 - Proteins: Primary Structure - Exercises - Page 129: 31

Answer

The intact protein should be Gln-Ala-Phe-Val-Lys-Gly-Tyr-Asn-Arg-Leu-Gly Now if we observe the segments from chymotrypsin digestion, we can understand that Asn-Arg-leu-glu should be together, Val-lys-gly-Tyr should also be together and Gln-Ala-Phe should also be together. Now looking at trypsin digested parts, Gln-Ala Phe should continue with Val-Lys which again should continue as Gly-Tyr (as all four amino acid should be together observed from chymotrypsin digestion. Now again from trypsin digested parts, Gly-Tyr should continue as Asn-Arg which again should be with Leu-Gly.

Work Step by Step

The intact protein should be Gln-Ala-Phe-Val-Lys-Gly-Tyr-Asn-Arg-Leu-Gly Now if we observe the segments from chymotrypsin digestion, we can understand that Asn-Arg-leu-glu should be together, Val-lys-gly-Tyr should also be together and Gln-Ala-Phe should also be together. Now looking at trypsin digested parts, Gln-Ala Phe should continue with Val-Lys which again should continue as Gly-Tyr (as all four amino acid should be together observed from chymotrypsin digestion. Now again from trypsin digested parts, Gly-Tyr should continue as Asn-Arg which again should be with Leu-Gly.
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