© Macmillan Learning Match each structure and description to the appropriate amino acid. Glycine Histidine NH₁₂+ NH₁₂+ H HH III H-C-C-C-C-COO- H H CH, H no chiral centers ↓ H-C-COO H one chiral center 0 Resources Solution ? Hint Sub Penalized Isoleucine H NH₁* ↓ H-C=C-C-C-COO IIII ┃┃ -z' N H NH H H smallest R group R group partially protonated at physiological pH two chiral centers Answer Bank

© Macmillan Learning Match each structure and description to the appropriate amino acid. Glycine Histidine NH₁₂+ NH₁₂+ H HH III H-C-C-C-C-COO- H H CH, H no chiral centers ↓ H-C-COO H one chiral center 0 Resources Solution ? Hint Sub Penalized Isoleucine H NH₁* ↓ H-C=C-C-C-COO IIII ┃┃ -z' N H NH H H smallest R group R group partially protonated at physiological pH two chiral centers Answer Bank

Organic Chemistry

9th Edition

ISBN:9781305080485

Author:John E. McMurry

Publisher:John E. McMurry

Chapter26: Biomolecules: Amino Acids, Peptides, And Proteins

Section26.1: Structures Of Amino Acids

Problem 3P

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22-59 What is the effect of salt bridges on the tertiary structure of proteins?
Isoleucine and threonine are the only two amino acids with two chirality centers. Assign R or S configuration to the methyl-bearing carbon atom of isoleucine.
22-91 Which amino acid does not rotate the plane of polarized light?
Ammonium group are m- directing but amino groups are o,p-directing. * O True O False All of the following C6H6 compounds has a single set of structurally equivalent hydrogen atoms. * H-CEC-C-C-CEC-H H2 H2 I II III IV VI O True O False
1. How many amino sugars can you see? 2. What pharmacophore is present in the structure?
Which of the natural amino acids below are acidic? H NH₂ HO 00000 Glycine (Gly; G) H₂N OH NH₂ Serine (Ser; S) NH H Gly Ala Val Leu NH₂ Methionine (Met; M) OH Phe Me. Arginine (Arg; R) HS OH HO NH₂ NH₂ Alanine (Ala; A) OH NH₂ Cysteine (Cys; C) OH OH the NH₂ NH₂ Threonine (Thr; T) OH Valine (Val, V) H₂N. HN OH H₂N EN NH₂ Histidine (His; H) NH₂ Asparagine (Asn ; N) Glutamine (Gln; Q) OH Leucine (Leu; L) OH NH₂ NH₂ OH НО. OH HO O NH₂ Aspartic acid (Asp; D) NH₂ Glutamic acid (Glu; E) HN- Phenylalanine (Phe; F) NH₂ OH H₂N Tryptophan (Trp; W) HiOH NH₂ OH OH H₂N. HO Lysine (Lys; K) ΝΗ O Proline (Pro; P) NH₂ NH₂ Asparagine (Asn ; N) OH OH Tyrosine (Tyr; Y) OH NH₂ OH
CH3 Polar neutral lysine H NH3 -COO glutamate Hydrophobic ooc-CH₂- H NH3 -Coo nonpolar amino acids Answer Bank Met Positively charged Gln H₂N-C-CH; Negatively charged H NH3 coo
Identify one amino acid from each of the following categories: H2N CH-C-OH H,N CH-C-OH H,N -CH-C-OH II II CH2 CH2 CH—ОН C=0 CH3 ÓH H,N- -CH-C HO H,N CH-ċ-OH CH, H,N–CH–C-OH CH2 CH2 CH, CH2 CH3 ČH3 IV V VI
ogical Marcomalee Identifying specific interactions between residues in a protein Imagine the main chain of a protein bends back on itself, so that two amino acid residues R, and R, come close to each other. Here's what R, looks like: -CH- -- CH2 OH O yes Could R, form a hydrogen bond with R₂ at physiological pH, if R₂ were the right kind of residue? O no If you said R, could form a hydrogen bond with R2, what would R₂ have to be? If there's only one possibility, write its 3-letter code. If there is more than one possibility, write the 3-letter code of any of them. 0 Explanation Check ㅎ C S A * 2 # 3 $ 4 Z W M S X Ő % Λ 25 & 6 7 E R T Y U D C dill LLC. All Rights Reserved. Terms of Use Privacy Center NP 8 A 9 O 0 LL F G H J K L V B N M P alt
2. Classify the following amino acids as nonpolar, polar basic, polar acidic, or polar neutral. (a) (b) (c) (d) H₂N-CH-COH CH-OH I CH3 || H₂N-CH-C-OH I CH₂ C=O 1 OH H₂N-CH-C-OH CH₂ T CH-CH3 CH₂ H₂N-CH-C-OH ī CH₂ OH 229
Identify the features of the two bonded amino acids depicted in the image. HOHH | || | | N-C-C-N-C-C CH CH₂2 CH₂2 CH₂ CH₂ I I CH₂ CH₂ NH₂+ O OH Answer Bank hydrophilic side chain hydrophobic side chain peptide bond carboxyl group amino group
a) b) c) HS e) н H₂N. d) HOT НО oel each chiral center in the amino acids as R or S. mo NH₂ I NH₂ OH OH OH O ОН NH₂ OH OH