A. Name 3 nonpolar amino acids found in proteins (give name and 3 letter code) B. Name 2 polar uncharged amino acids (name and 3 letter code). C. Name 2 aromatic amino acids (name and 3 letter code).
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A. Name 3 nonpolar amino acids found in proteins (give name and 3 letter code)
B. Name 2 polar uncharged amino acids (name and 3 letter code).
C. Name 2
A) Non-polar amino acids: The side chain comprises mostly of hydrocarbons.
B) Polar uncharged amino acids: The side chain consists of a range of functional groups.
C) Aromatic amino acid: consists of an aromatic ring.
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- a. How many peptide bonds are there? b. How many amino acid residues are there? c. In exact order, identify the name of the amino acids in the peptide chain. d. Give the full name of this peptide. e. Give the 3-letter abbreviation and 1-letter abbreviation. f. Calculate the pI of this peptide.a. A tetrapeptide is abbreviated as PSQE. Write the name of the amino acid at the N-terminal end. b. A tetrapeptide is abbreviated as FRWL. Write the name of the amino acid at the C-terminal end.Which of these amino acids is an acidic amino acid? (Select all that apply, if necessary.) B. C. D. A. H₂ND CH-&- H₂ND H₂ND CH-1 CH₂ CH₂ CH-CH3 C=O I CH3 оӨ H₂N- -CH-C I CH₂ CH₂ CH₂ NH + C=NH2 NH₂ amino acid D amino acid C amino acid E amino acid B amino acid A O H₂N-CH-C- CH₂ T CH₂ C=0 NH₂ E. His H₂N-CH-C CH₂ ОН
- Which of these amino acids is a polar, uncharged amino acid? (Select all that apply, if necessary.) A. B. D. E. CHLO H₂N-CH-C CH₂ CH₂ CH₂ NH C=NH2 NH₂ amino acid A amino acid C amino acid D amino acid B amino acid E H₂N-CH-C CH₂ _i_g C. H₂N-CH-C- CH2₂ I CH₂ =0 NH₂ H₂N-CH- CH₂ CH-CH3 CH3 H₂ND H₂N-CH- | CH₂ Ï OHRefer to image below: Identify the R-group of each molecule. * H3C. OH HS OH H2N. HO. ČH3 NH2 NH2 NH2 Choose A. Alkyl B. Sulfide C. Guanidino A. Alkyl B. Thiol C. Amino A. Ethylene B. Thiol C. Amino A. Alkyl B. Sulfide C. Amino nino acids. *Which of these amino acids is a hydrophobic amino acid? (Select all that apply, if necessary.) A. B. C. D. E. iº H₂N-CH-C CH₂ T CH₂ CH₂ NH C=NH2 NH₂ amino acid E amino acid D amino acid B amino acid C amino acid A 200 H₂N-CH-C CH₂ C=O I OO H₂N-CH-C- CH₂ CH₂ T C=O T NH₂ 0 H₂N-CH- CH₂ CH-CH3 CH3 H₂N-CH-C CH₂ I OH -0
- For each amino acid: [1] draw the L enantiomer in a Fischer projection; [2] classify the amino acid as neutral, acidic, or basic; [3] give the three-letter symbol; [4] give the one-letter symbol. a. arginine c. glutamic acid b. tyrosine d. valineWrite the structure, identify the groups and describe the chemical properties of these amino acids. A. alanine B. Serine C. Leucine D. Phenylalanine E. TryptophanThe image below shows an amino acid at physiological pH. Answer the following questions about this amino acid. H | // - c H3N* | CH2 CH2 | H2N a. How many carbons are in this amino acid's side chain? Entry Format: please type your answer as a number. 3 b. Is the side chain of this amino acid ionized at physiological pH? Entry Format: Please type the word yes or no without any capitalization. yes c. At physiological pH, amino acids have two ionic charges, one positively charged group and one negatively charged group. What is the term for this sort of molecule? Entry Format: Please type your response with all lowercase letters.
- Case B: An oligopeptide has the ff amino acid composition: 2 Phe, 2 Met, 2 Glu, 1 Arg, 1 Val, 1 Leu, 1 Lys, 1 Gly, 1 Ser The reaction of the intact peptide with Sanger reagent followed by acid hydrolysis creates a derivative of Met. Specific cleavage of the intact peptide (using chymotrypsin) produces fragments with the ff sequences: Fragment A: Glu-Gly-Lys-Phe Fragment B: Met-Ser-Leu-Arg Fragment C: Met-Val-Glu-Phe Question: What information do these result give about the sequence of the peptide?Which of these amino acids is a basic amino acid? (Select all that apply, if necessary.) A. B. C. D. O MNCHI MCHEⓇ || H₂N- H₂N- CH-C- CH₂ CH₂ CH₂ C=O CH₂ Oe NH + C=NH2 NH₂ amino acid E amino acid D amino acid A amino acid B amino acid C H₂N-CH- CH₂ T CH₂ C=O T NH₂ H₂NⓇ 용_。 CH₂ CH-CH3 CH3 E. H₂N-CH-C-0 CH₂ OHGive the complete name of the peptide below.