Trypsin is a digestive enzyme that hydrolyzes peptide bonds only when the carbonyl group inthe amide bond comes from lysine or arginine. Draw the structure of the amino acids and peptidesformed by hydrolysis of the following peptide with trypsin: Gly-Lys-Arg-Ala-Ala-ArgDraw the structure of the amino acid phenylalanine at a pH of 1.

Summary of Answers:Hydrolysis by Trypsin:Fragments: Gly—Lys, Arg, Ala—Ala, ArgPhenylalanine…

Answered: Trypsin is a digestive enzyme that…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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b) It's said that secondary structures form because of intra- and intermolecular hydrogen bonding involving the peptide bond. Describe what is going on to further stabilize secondary structure through these interactions.
Together, these monomers make up what type of polymer (macromolecule)? List at least three (broad) functions that these macromolecules can perform. What is an example protein that we’ve discussed that uses of these functions? Using R as the side chain, draw the basic structure of an amino acid.
The amino acid arginine ionizes according to the following scheme: (a) Calculate the isoelectric point of arginine. You can neglect contributions from form I. Why? (b) Calculate the average charge on arginine when pH = 9.20. (c) Is the value of average charge you calculated in part b reasonable, given the pI you calculated in part a? Explain your answer
T/F: The titration curve for serine will have 2 inflection points. T/F: The Amino Acid D-selenocysteine has an R-Configuration T/F: Each water molecule can form H bonds with 4 other water molecules T/F: In a buffer system, decreasing the concentration of the conjugate base relative to acid makes the buffer more acidic T/F: Glycine forms good interactions in a protein structure True or false?
Provide the correct three-letter abbreviation for the following amino acid: O || H₂N-CH-C-OH I CH₂ CH₂ C=O I NH₂
the overall, net ionic charge on this peptide at pH = 7 would be: Cys - Ala - Glu-Arg - Met - Ser
At what pH can you separate the following peptides: ala-ala-ala, glu-glu-glu, his-his-his? OA 2.0 B. 4.0 C. 5.0 O D. 7.0 E. 9.5
1) Indicate the total charge of the peptide at pH 7.0, 9.0, and 11.0 2) Determine the isoelectric point (pI) for this peptide. Show the relevant pKa’s and your calculation. 3) What is the fraction of the peptide that has the N-terminal amino group deprotonated at pH 9.
A HEPTAPEPTIDE that punctures the bacterial cell wall has just been recently isolated from the venom gland of a frog. Amino acid analysis of the peptide reveals the following information below: (NOTE: when the sequence is not known, a comma separates the amino acids) Hydrezine Acid Hydrolysis (6 N HC) at 10 C Heptapeptide (2) Arg. Pro, Phe, Tyr, Ala, Lys 2,4 dinitrafluerobenzene DNP-Phe Lys and modified free amino acids Peptide 1 (Ala, Lys) Cleovage with Trypsin, then chrometogrophy Peptide 2 (Pro, Arg, Tyr) Peptide 3 (Phe, Arg) Phe Peptide 4 (Arg. Tyr) Clevege with Chymetrypsin, then cromategrphy Peptide 5 (Lys, Pro, Ala, Arg)
Draw the two dipeptides possible when glutamine and cysteine undergo dehydration to form a peptide bond. Draw the dipeptides in zwitterionic form.
Write the structure of the following peptides Expanded structure. Use any other ink for peptide bond. [For your reference download all the amino acids with the three and single letter symbol] a) leucyl glycyl leucyl alanine b) histidyl tyrosyl alanyl glycine c) glycyl phenylalanyl tyrosyl seryl histidine
Draw the Fischer projections representing the L forms of the following amino acids at pH higher than their isoelectric point. a) cysteine b) alanine

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