Biochemistry
9th Edition
ISBN: 9781319114671
Author: Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher: W. H. Freeman
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Question
Write the one letter code for the oligopeptide Ser-Cys-Ile-Glu-Asn-Cys-Glu and calculate the total charge on it at pH 4.5.
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- the following peptide is incubated as chymotrypsin: Gly-Val-Phe-Lys-Ala. Present the detailed chemical mechanism by which chymotrypsin hydrolyzes this peptide. Briefly explain each step. Include only the structure of the final products of the reaction.arrow_forwardIdentify the a-carbon of aminolevulinic acid.arrow_forwardDraw a schematic of the chemical structure of the Leu-Tyr-Met-Lys tetrapeptide, with the correct ionization at neutral pH (pH 7). Also, give an estimate the pl of this tetrapeptide (you are given that the pKa of any acidic R group is 4, the pKa of any basic R group is 11.5, and the pKa of the α-COOH is 2, and the a-NH3 is 9.5). Provide rationale!arrow_forward
- Draw the structure of Pro-Leu-Glu at physiological pH (7.4).arrow_forwarddraw disaccharide as Haworth projection: (shown in image) -is this drawing a reducing sugar? Briefly explainarrow_forwardg) (CH3)₂ - CH₂ -CH-COOH + CH₂-CH-COOH -H₂O NH₂ OH NH₂ 4. Write the equation for the digestion (hydrolysis) of Phe-Asp-Ala. €arrow_forward
- Draw the titration curves for the following AA’s: Aspartic acid, Alanine, Lysine, Valine, Serine, and Trrosine.arrow_forwardDraw the tetrapeptide Met-Ile-Lys-Glu at a ph of 7?arrow_forwardDraw tripeptide Lys-Thr-Glu at pH 7.4 and circle the six atoms that are restricted in the same plane.arrow_forward
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