Domanda del libro di testo
Which of the following forms of aspartic acid would you expect to predominate at low pH, neutral pH, and high pH?
a.
b.
c.
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Ch.18 Amino Acids and Proteins
McMurry8th EditionFundamentals of General, Organic, and Biological ChemistryISBN: 9780134015187
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TOC.tableOfContents
- Ch.1 Matter and Measurements27
- Ch.2 Atoms and the Periodic Table20
- Ch.3 Ionic Compounds8
- Ch.4 Molecular Compounds23
- Ch.5 Classification & Balancing of Chemical Reactions12
- Ch.6 Chemical Reactions: Mole and Mass Relationships28
- Ch.7 Chemical Reactions: Energy, Rate and Equilibrium64
- Ch.8 Gases, Liquids and Solids24
- Ch.9 Solutions52
- Ch.10 Acids and Bases25
- Ch.11 Nuclear Chemistry22
- Ch.12 Introduction to Organic Chemistry: Alkanes57
- Ch.13 Alkenes, Alkynes, and Aromatic Compounds47
- Ch.14 Some Compounds with Oxygen, Sulfur, or a Halogen50
- Ch.15 Aldehydes and Ketones45
- Ch.16 Amines42
- Ch.17 Carboxylic Acids and Their Derivatives57
- Ch.18 Amino Acids and Proteins82
- Ch.19 Enzymes and Vitamins63
- Ch.20 Carbohydrates44
- Ch.21 The Generation of Biochemical Energy65
- Ch.22 Carbohydrate Metabolism45
- Ch.23 Lipids42
- Ch.24 Lipid Metabolism33
- Ch.25 Protein and Amino Acid Metabolism24
- Ch.26 Nucleic Acids and Protein Synthesis45
McMurry8th EditionFundamentals of General, Organic, and Biological ChemistryISBN: 9780134015187Non è quello che usi tu?Cambia libro di testo
Capitolo 18, Problema 48
Draw leucine and identify any chiral carbon atoms with arrows.
Guida verificata passo dopo passo1
Step 1: Begin by understanding the structure of leucine, which is an amino acid. Leucine has the general structure of an amino acid: a central carbon atom (called the alpha carbon) bonded to an amino group (-NH₂), a carboxyl group (-COOH), a hydrogen atom, and a side chain specific to leucine.
Step 2: Draw the structure of leucine. The side chain of leucine is an isobutyl group (-CH₂-CH(CH₃)₂). Attach this side chain to the alpha carbon. The complete structure should show the alpha carbon bonded to the amino group, carboxyl group, hydrogen atom, and the isobutyl side chain.
Step 3: Identify the chiral carbon atoms. A chiral carbon is a carbon atom that is bonded to four different groups. In leucine, the alpha carbon is bonded to four distinct groups: the amino group, the carboxyl group, the hydrogen atom, and the isobutyl side chain. This makes the alpha carbon a chiral center.
Step 4: Use arrows to indicate the chiral carbon atom in your drawing. Clearly mark the alpha carbon with an arrow to show that it is the chiral center in leucine.
Step 5: Verify your drawing and labeling. Ensure that the structure of leucine is correct and that the chiral carbon is properly identified. Double-check that the alpha carbon is bonded to four distinct groups, confirming its chirality.
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Leucine Structure
Leucine is an essential branched-chain amino acid with the chemical formula C6H13NO2. It consists of a central carbon atom (the alpha carbon) bonded to an amino group, a carboxyl group, a hydrogen atom, and a variable side chain (isobutyl group). Understanding its structure is crucial for identifying chiral centers.
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Percorso guidato
1:01
Structural Formula Concept 2
Chirality
Chirality refers to the geometric property of a molecule having non-superimposable mirror images, much like left and right hands. A carbon atom is considered chiral if it is bonded to four different substituents. Identifying chiral centers in leucine is essential for understanding its stereochemistry and biological function.
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Percorso guidato
1:39Chirality Example 1
Chiral Carbon Atoms
Chiral carbon atoms are specific carbon atoms in a molecule that have four distinct groups attached to them, leading to two possible stereoisomers. In leucine, the alpha carbon is a chiral center, and recognizing it is important for drawing the molecule accurately and understanding its role in protein structure.
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Percorso guidato
2:37Chirality Concept 1
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