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Question 30 (1 point) Saved If an amino acid with a nonionizable side chain has a...
What is isoelectric point? The amino acid glycine has two ionizable groups: 1) a carboxyl acid...
What is isoelectric point? The amino acid glycine has two ionizable groups: 1) a carboxyl acid group with a pKa of 2.72 and 2) an amino group with a pKa of 9.60. Calculate the pI of glycine.
a-carboxyl group pka Amino acid Ala a-amino group pka 9.7 2.3 Arg 9.0 9.0 Asnor Gin...
a-carboxyl group pka Amino acid Ala a-amino group pka 9.7 2.3 Arg 9.0 9.0 Asnor Gin Asp or Glu Cys 9.8 10.8 His 9.2 9.2 9.1 Calculate the pl of ASN: 6.0 2.5 5.5 10.7 5.0
What is the one-letter code for the amino acid that has a side chain that contains...
What is the one-letter code for the amino acid that has a side chain that contains a secondary alcohol? T K A E G Correct answer is T What is the one-letter code for the amino acid that has a methyl group as its side chain? E A T G K Correct answer is A
15. Which is used to reduce the disulfide bonds in proteins? D) iodoacetate B) performic acid C) DTT A) PITC 16. Wh...
15. Which is used to reduce the disulfide bonds in proteins? D) iodoacetate B) performic acid C) DTT A) PITC 16. What is the net charge on the tripeptide Gly-Asp-Lys at pH 1.5? The table below gives the pKa's of the ionizable groups on the free amino acids. Free amino acid pK, of a-Carboxyl pKs of side chain pKa of a-amino group 2.4 group 9.8 Glycine Aspartate Lysine 2.0 3.9 9.9 2.2 9.1 10.5 A) -2 B) C) D) +2...
5. Amino acid titration. The graph below shows a titration of an amino acid with NaOH....
5. Amino acid titration. The graph below shows a titration of an amino acid with NaOH. This experiment reveals several important features of this amino acid. A) What is the identity of the amino acid? [Write its full name.] B) Match the following points in the titration curve. [In the space beside each description (left), write a number (1-6) corresponding to a specific pH (right).] The amino acid is fully protonated. 1) pH=0.0 PH The amino acid is fully deprotonated....
I dont really know how to do this question A8 Two acid dissociation constants (pka) of...
I dont really know how to do this question
A8 Two acid dissociation constants (pka) of the amino acid aspartic acid are shown below. The measured isoelectric point (pl) is 3.0. What is the pka of the carboxylic acid side chain? PK, 9.8 pk, 2.1 *H3N он Questions continue over page
At a pH of 4: Amino acid 1 OH Amino acid 2 NH OH HN NH,...
At a pH of 4: Amino acid 1 OH Amino acid 2 NH OH HN NH, OH pka Amino Amino Acid 1 Acid 2 9.82 9.18 Amino terminus Carboxy terminus 2.1 1.77 Side chain 3.86 6.1 O (Answer B) the R group (side chain) on amino acid 1 will be deprotonated A and B (Answer A) the amino terminus on amino acid OH HN OH pka Amino Acid 1 Amino Acid 2 Amino terminus 9.82 9.18 Carboxy terminus 2.1 1.77...
Question 2 1 pts Amino acids are classified by their Rgroup (side chain) carboxylic acid group...
Question 2 1 pts Amino acids are classified by their Rgroup (side chain) carboxylic acid group peptide bond alpha carbon amine group
help with this question Consider a 0.211 L solution of the amino acid aspartic acid (0.631...
help with this question
Consider a 0.211 L solution of the amino acid aspartic acid (0.631 M), which has an alpha carboxylic acid group (pka = 2.10), an alpha amine group (pka = 9.82), and a carboxylic acid group in the side chain (pka = 3.86). If the titration is started at a very low pH, how many liters of 2.25 M NaOH would you need to add to reach the isoelectric point of the amino acid? Give your answer...
The carboxylic acid group (COOH) in the side chain of Aspartic acid (shown below), one of...
The carboxylic acid group (COOH) in the side chain of Aspartic acid (shown below), one of the 20 naturally occurring amino acids, has a pKa of 4.1. Calculate the percentage of conjugate base (COO- ) for this carboxylic acid group in the side chain of Aspartate at the following pH values: 2.1 , 4.1 and 5.1.
a-carboxyl group pka Amino acid Ala a-amino group pka 9.7 2.3 Arg 9.0 9.0 Asnor Gin Asp or Glu Cys 9.8 10.8 His 9.2 9.2 9.1 Calculate the pl of ASN: 6.0 2.5 5.5 10.7 5.0
15. Which is used to reduce the disulfide bonds in proteins? D) iodoacetate B) performic acid C) DTT A) PITC 16. What is the net charge on the tripeptide Gly-Asp-Lys at pH 1.5? The table below gives the pKa's of the ionizable groups on the free amino acids. Free amino acid pK, of a-Carboxyl pKs of side chain pKa of a-amino group 2.4 group 9.8 Glycine Aspartate Lysine 2.0 3.9 9.9 2.2 9.1 10.5 A) -2 B) C) D) +2...
5. Amino acid titration. The graph below shows a titration of an amino acid with NaOH. This experiment reveals several important features of this amino acid. A) What is the identity of the amino acid? [Write its full name.] B) Match the following points in the titration curve. [In the space beside each description (left), write a number (1-6) corresponding to a specific pH (right).] The amino acid is fully protonated. 1) pH=0.0 PH The amino acid is fully deprotonated....
I dont really know how to do this question
A8 Two acid dissociation constants (pka) of the amino acid aspartic acid are shown below. The measured isoelectric point (pl) is 3.0. What is the pka of the carboxylic acid side chain? PK, 9.8 pk, 2.1 *H3N он Questions continue over page
At a pH of 4: Amino acid 1 OH Amino acid 2 NH OH HN NH, OH pka Amino Amino Acid 1 Acid 2 9.82 9.18 Amino terminus Carboxy terminus 2.1 1.77 Side chain 3.86 6.1 O (Answer B) the R group (side chain) on amino acid 1 will be deprotonated A and B (Answer A) the amino terminus on amino acid OH HN OH pka Amino Acid 1 Amino Acid 2 Amino terminus 9.82 9.18 Carboxy terminus 2.1 1.77...
Question 2 1 pts Amino acids are classified by their Rgroup (side chain) carboxylic acid group peptide bond alpha carbon amine group
help with this question
Consider a 0.211 L solution of the amino acid aspartic acid (0.631 M), which has an alpha carboxylic acid group (pka = 2.10), an alpha amine group (pka = 9.82), and a carboxylic acid group in the side chain (pka = 3.86). If the titration is started at a very low pH, how many liters of 2.25 M NaOH would you need to add to reach the isoelectric point of the amino acid? Give your answer...
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