E. Histidine is an amino acid with three titratable groups: an -NH," group(pK, = 9.2), a -COOH group (pK, = 1.8), and an imidazole (amine-like) group (pK, = 6.0). The titration curve for histidine is shown belowwith four points highlighted.(a) Identify which point on the titration curve corresponds to the pK, foreach of the titratable groups, and which point corresponds to the pl.Explain your choices.(b) Calculate the value of pl for histidine.1412106.42-23Moles "OH added per mole histidineна

Introduction- Functional group reaction wiht hydrogen ion is determined by titration curve or any…

Answered: E. Histidine is an amino acid with…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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Histidine is an amino acid with three titratable groups: an -NH3+ group (pKa = 9.2), a -COOH group (pKa = 1.8), and an imidazole (amine-like) group (pKa = 6.0). The titration curve for histidine is shown below with four points highlighted. (a) Identify which point on the titration curve corresponds to the pKa for each of the titratable groups, and which point corresponds to the pI. Explain your choices. (b) Calculate the value of pI for histidine
Draw a complete structural representation for the tetrapeptide Phe-Met-Tyr-Asn (NOTE:use the zwitterion form) Give the IUPAC name for the tetrapeptide formation of F-M-Y-N. List all the possible tetrapeptide formed from one of each amino acids Phe-Met-Tyr-Asn? (NOTE: Use the three letter abbreviation code for the amino acids in answering D)
LEFT:You have the following titration curve of an amino acid with a non-polar R-group with arrows on curve from (1) to (5). RIGHT: This amino acid has the following structures (a) to (e)) at different points of the titration curve. Match each numbered arrow on the curve (from (1) to (5)) with the appropriate amino acid structure (from (a) to (e)) 12 (5) H.NCHCOH + HNCHCO (a) 10 (4) CH3 CH Isoelectrin HŃCHCO + (b) ppint 43) HNCHCO CH3 CH3 (2) HaNCHCOH H. NCHCO (e) (d CH3 CH3 0.0 0.5 1.0 15 20 NaOH equivalents. H-NCHCO (e) CH3
LEFT You have the following titration curve of an amino acid with a non-polar R-group with arrows on curve from (1) to (5). RIGHT. This amino acid has the following structures ((a) to (e)) at different points of the titration curve. Match each numbered arrow on the curve (from (1) to (5) with the appropriate amino acid structure (from (a) to (e)) 12 (5) H,NCHCOH + H NCHC (a) 10 (4) CH, CH Isoelectrie HNCHCO+ (b) point HNCHCO 43) CH CH (2) HNCHCOH H,NCHCO (C) CH3 CH3 0.0 0.5 1.5 20 NaOH equivalents HNCHCO (e) CH3
Complete the following table by providing the Fischer and Haworth Projections of the given sugars. In the Fischer Projection put an asterisk (*) mark in the chiral centers of the molecule. Sugar Fischer Projection Haworth Projection (Complete) alpha-anomer Haworth Projection (Abbreviated) beta-anomer L-Galactose L-Fructose D-Mannose D-Xylose L-Lyxose
Complete the following table by providing the Fischer and Haworth Projections of the given sugars. In the Fischer Projection put an asterisk (*) mark in the chiral centers of the molecule. Sugar Fischer Projection Haworth Projection (Complete) alpha-anomer Haworth Projection (Abbreviated) beta-anomer D-Mannose D-Xylose L-Lyxose
Identify the following amino acid at pH = 7 (aqueous form): (COO-)–CH(NH3+)–CH2–(COO-) aspartic acid asparagine histidine arginine lysine
Help me
a. Use three-letter amino acid abbreviations to write the representation for the tripeptide shown here. i H₂N-CH-C-N-CH-C-N-CH-C-0- CH₂ H -NH H ī CH₂ SH -CH-C-0- CH-OH CH3 b. Give the full name of the amino acid at the C-terminal end of this tripeptide. H₂N-CH-C-N-CH-C-N-CH-C-O- -CH-C-N-CH-C CH₂ c-o- CH₂ OH
Sketch the titration curve for the amino acid alanine with pka1 = 2.34 and pka2 = 9.69.
Write the name of the oligopeptide L-E-T-S-P-R-A-Y using their full amino acid names. Draw the structure of olgopeptide L-E-T-S-P-R-A-Y.
Complete the following table by providing the Fischer and Haworth Projections of the given sugars. In the Fischer Projection put an asterisk (*) mark in the chiral centers of the molecule. Sugar Fischer Projection Haworth Projection (Complete) alpha-anomer Haworth Projection (Abbreviated) beta-anomer L-Galactose L-Fructose D- Xylose

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