Homework Answers
At pk1 = 2.29 the net charge is 1
At pk2 = 9.12 the net charge is 0
Here zwitter ion is formed.
So isoelectric point is pI =( 2.29+9.12)/2 = 5.70
So the pI value of the given peptide chain is 5.70
Add Answer to:
ZI 5-0 2. Estimate the pl value of the following pentapeptide. Explain. (5 marks) H2N-CHC N-CHC...
#1) For the following pentapeptide (Where pH =1): a) What would the net charge be for...
#1) For the following pentapeptide (Where pH =1):
a) What would the net charge be for the following pH?
pH 0 =
pH 3 =
pH 5 =
pH 7 =
pH 10 =
pH 13 =
b) Calculate the pl of the pentapeptide. (Cysteine: pK1 = 1.96,
pK2 = 10.128) ( Glutamine: pK1 = 2.17 , pK2 = 9.13) (Arginine: pK1
= 2.17. pK2 = 9.04) (Leucine: pK1 = 2.36 , pK2 = 9.60)
c) If you were to...
2 1 attempts left Check my work Which of the following amines can be used to resolve a racemic mi...
Please answer all questions.
The answer to question #2 is incorrect.
2 1 attempts left Check my work Which of the following amines can be used to resolve a racemic mixture of amino acids? Select all that apply. 0.5 points NH2 HIH eBook Ho Print NH2 References Be sure to answer all parts. The structure of the amino acid sequence Gly-His-Leu is shown below. Select the letters that correspond to the N-terminal(s), the C-terminal(s), and amide bond(s). (CH3)2CHCH2 0.5 points...
From N to C terminus, name the amino acids in the polypeptide shown below using single-letter...
From N to C terminus, name the amino acids in the polypeptide shown below using single-letter codes. (Do not use punctuation marks or spaces to separate the letter (ie. if the 3 amino acids are A, B and C, write the sequence as ABC) 0 - 0- CH3 6- H₃C CH₂ Han CH2 CH2 CH-CH3 CH2 CH3 CH2 CH2 NH3 Which of the following is NOT a naturally occurring amino acid? OA) H3NCH-Coo OB) H3NCH-Coo CH2 он Oc) HNCH-Coo CH-OH...
20. 3 marks) Add charges to the following molecules where necessary c) CH3-N-H CH3H CH3 21....
20. 3 marks) Add charges to the following molecules where necessary c) CH3-N-H CH3H CH3 21. (2 marks) Label the reactants in these acid-base reactions as "LA" for Lewis Acids (electrophiles) or "LB" for Lewis Bases (nucleophiles). reactions. Used curved arrows to show the movement of electron pairs in the CH3-NH, CH-CH2-cl: CH-NH2-CH2-CH3 + --+ + :C1: Cl: -
Q1. Give R and S configuration to the following compounds (5 Marks) C2H5 i) H3C-C-H OH...
Q1. Give R and S configuration to the following compounds (5 Marks) C2H5 i) H3C-C-H OH C2H5 ii) H2N-C-CH2-CH2-CH3 H ОН iii) H CH2-CH2-CI iv) HO-H2C-H2C-C-CH2-CH2-CH3 1 Н. C/ H2C H-C-CH3 CH2
Name the following organic compounds. Please explain. ÇHz—CH CH3-CH-CH2 - CH2 - CH2-OH H3C- N- CH3...
Name the following organic compounds. Please explain.
ÇHz—CH CH3-CH-CH2 - CH2 - CH2-OH H3C- N- CH3 CH3 17. CH2-CH-CH2-CH2-O-CHZ CH2-O-CH3 CH3 18. 19. CH3 CH3 CH2 - CH-CH-C- CH2 CH2 - CH - CH2 - CH2-C-H CH CH3 Pongracando con 20. CH3 -CH-CH2-CH-C-OH 21. CH, -CH-C-CH=CH2 CHZ CHE 22. CH3-CH - CH2 - CH2 - C -0 - CH3 23. CH3-CH2—6- NH-CH3 CH CH CI CH2 - CH2 25. CH2 - CH3 CH2 - CH3 HO 27. ÇH2CH-CH2 ӧн Онон
please help. thanks in advance! 6 Which of the following arrows correctly points to the anomeric carbon? 7. Of the following, what is the most likely reason that cooking with Nutrasweet (Aspartam...
please help. thanks in advance!
6 Which of the following arrows correctly points to the anomeric carbon? 7. Of the following, what is the most likely reason that cooking with Nutrasweet (Aspartame) destroys the sweetness? HO-C-CH2-CH-C-N-CH-C-OCH NH2 CH2-CsHs Aspartame 8. A heptapeptide containing 2 alanine residues and one each of glutamine, phenylalanine, roline, tyrosine and valine was analyzed as follows: 1. Treatmen w 2,4-dinitrofluorobenzene followed by complete hydrolysis yielded 2,4-dinitrophenylalanine. 2. Partial hydrolysis with aqueous acid yielded the following fragments:...
- Use the structure of the peptide to complete the problems/questions following. O HONE CH- H-º-N...
- Use the structure of the peptide to complete the problems/questions following. O HONE CH- H-º-N CH-c o- CH2 CH-OH CH2 CH2 CH3 C=0 ΝΗ NH2 a. (4 pts) Name (full name) the N-terminal amino acid? b. (4 pts) Name (full name) the C-terminal amino acid? C. (5 pts) Using the 1 letter amino acid abbreviation, give the name of the peptide.
g) Which structure is Z-2-bromo-3-methyl-2-pentene? CH3 H3C CH2CH3 H C=C CH-CH,CH, CH3 CH3 Вісн. C=C CH3...
g) Which structure is Z-2-bromo-3-methyl-2-pentene? CH3 H3C CH2CH3 H C=C CH-CH,CH, CH3 CH3 Вісн. C=C CH3 Br н Br | BÁ CHẠCH, C=C CH, CHỊCH, 10) Which compounds contain stereocenters? D) 1-chloropentane II) 2-chloropentane III) 3-chloropentane IV) 1,2-dichloropentane 11) Aspartame is an artificial, non-saccharide sweetener. It is made from two amino acids phenylalanine (methyl ester) and aspartic acid. Both aminoacids have one stercocenter. Both stereocenters have S-stereoconfiguration. Which of the two structures is aspartame? H2N-C-C-N-C-0-0 CH2 CH2 c=0 HO HO...
1. Draw structures for the following compounds: a) l-ethyl-2-methylcyclohexane b) 4-methyl hexanal c) N-N-dimethylpentanamide 2. What...
1. Draw structures for the following compounds: a) l-ethyl-2-methylcyclohexane b) 4-methyl hexanal c) N-N-dimethylpentanamide 2. What is the product of this bromination reaction? H2C-CH=CH-CH2-CH2-CH3 + Br2 3. What is the product of this oxidation reaction? OH H3C-CH-CH-CHg 10 Сн, 4. Consider the esterification reaction reaction below: H, SO H3C-CH2-CH2-CH2-C-OH + H2C-CH2-OH What organic compound is the reactant on the left? What organic compound is the reactant on the right? Draw the product of the reaction. What type of organic compound...
#1) For the following pentapeptide (Where pH =1):
a) What would the net charge be for the following pH?
pH 0 =
pH 3 =
pH 5 =
pH 7 =
pH 10 =
pH 13 =
b) Calculate the pl of the pentapeptide. (Cysteine: pK1 = 1.96,
pK2 = 10.128) ( Glutamine: pK1 = 2.17 , pK2 = 9.13) (Arginine: pK1
= 2.17. pK2 = 9.04) (Leucine: pK1 = 2.36 , pK2 = 9.60)
c) If you were to...
Please answer all questions.
The answer to question #2 is incorrect.
2 1 attempts left Check my work Which of the following amines can be used to resolve a racemic mixture of amino acids? Select all that apply. 0.5 points NH2 HIH eBook Ho Print NH2 References Be sure to answer all parts. The structure of the amino acid sequence Gly-His-Leu is shown below. Select the letters that correspond to the N-terminal(s), the C-terminal(s), and amide bond(s). (CH3)2CHCH2 0.5 points...
From N to C terminus, name the amino acids in the polypeptide shown below using single-letter codes. (Do not use punctuation marks or spaces to separate the letter (ie. if the 3 amino acids are A, B and C, write the sequence as ABC) 0 - 0- CH3 6- H₃C CH₂ Han CH2 CH2 CH-CH3 CH2 CH3 CH2 CH2 NH3 Which of the following is NOT a naturally occurring amino acid? OA) H3NCH-Coo OB) H3NCH-Coo CH2 он Oc) HNCH-Coo CH-OH...
20. 3 marks) Add charges to the following molecules where necessary c) CH3-N-H CH3H CH3 21. (2 marks) Label the reactants in these acid-base reactions as "LA" for Lewis Acids (electrophiles) or "LB" for Lewis Bases (nucleophiles). reactions. Used curved arrows to show the movement of electron pairs in the CH3-NH, CH-CH2-cl: CH-NH2-CH2-CH3 + --+ + :C1: Cl: -
Q1. Give R and S configuration to the following compounds (5 Marks) C2H5 i) H3C-C-H OH C2H5 ii) H2N-C-CH2-CH2-CH3 H ОН iii) H CH2-CH2-CI iv) HO-H2C-H2C-C-CH2-CH2-CH3 1 Н. C/ H2C H-C-CH3 CH2
Name the following organic compounds. Please explain.
ÇHz—CH CH3-CH-CH2 - CH2 - CH2-OH H3C- N- CH3 CH3 17. CH2-CH-CH2-CH2-O-CHZ CH2-O-CH3 CH3 18. 19. CH3 CH3 CH2 - CH-CH-C- CH2 CH2 - CH - CH2 - CH2-C-H CH CH3 Pongracando con 20. CH3 -CH-CH2-CH-C-OH 21. CH, -CH-C-CH=CH2 CHZ CHE 22. CH3-CH - CH2 - CH2 - C -0 - CH3 23. CH3-CH2—6- NH-CH3 CH CH CI CH2 - CH2 25. CH2 - CH3 CH2 - CH3 HO 27. ÇH2CH-CH2 ӧн Онон
please help. thanks in advance!
6 Which of the following arrows correctly points to the anomeric carbon? 7. Of the following, what is the most likely reason that cooking with Nutrasweet (Aspartame) destroys the sweetness? HO-C-CH2-CH-C-N-CH-C-OCH NH2 CH2-CsHs Aspartame 8. A heptapeptide containing 2 alanine residues and one each of glutamine, phenylalanine, roline, tyrosine and valine was analyzed as follows: 1. Treatmen w 2,4-dinitrofluorobenzene followed by complete hydrolysis yielded 2,4-dinitrophenylalanine. 2. Partial hydrolysis with aqueous acid yielded the following fragments:...
- Use the structure of the peptide to complete the problems/questions following. O HONE CH- H-º-N CH-c o- CH2 CH-OH CH2 CH2 CH3 C=0 ΝΗ NH2 a. (4 pts) Name (full name) the N-terminal amino acid? b. (4 pts) Name (full name) the C-terminal amino acid? C. (5 pts) Using the 1 letter amino acid abbreviation, give the name of the peptide.
g) Which structure is Z-2-bromo-3-methyl-2-pentene? CH3 H3C CH2CH3 H C=C CH-CH,CH, CH3 CH3 Вісн. C=C CH3 Br н Br | BÁ CHẠCH, C=C CH, CHỊCH, 10) Which compounds contain stereocenters? D) 1-chloropentane II) 2-chloropentane III) 3-chloropentane IV) 1,2-dichloropentane 11) Aspartame is an artificial, non-saccharide sweetener. It is made from two amino acids phenylalanine (methyl ester) and aspartic acid. Both aminoacids have one stercocenter. Both stereocenters have S-stereoconfiguration. Which of the two structures is aspartame? H2N-C-C-N-C-0-0 CH2 CH2 c=0 HO HO...
1. Draw structures for the following compounds: a) l-ethyl-2-methylcyclohexane b) 4-methyl hexanal c) N-N-dimethylpentanamide 2. What is the product of this bromination reaction? H2C-CH=CH-CH2-CH2-CH3 + Br2 3. What is the product of this oxidation reaction? OH H3C-CH-CH-CHg 10 Сн, 4. Consider the esterification reaction reaction below: H, SO H3C-CH2-CH2-CH2-C-OH + H2C-CH2-OH What organic compound is the reactant on the left? What organic compound is the reactant on the right? Draw the product of the reaction. What type of organic compound...
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