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RELEVANT LEARNING OUTCOME:
(a) Describe the structure and properties of the following monomers: amino acids (in proteins). (chemical formulae of specific R-groups of different amino acids are not required)
🕐Estimated time for this section: 15 minutes
Introduction to Amino acids
Introduction to Amino acids
👁️🗨️ Watch the video 0:56-2:48 for the introduction to Amino Acids & their R- groups
Classification of amino acids
a. Non-polar neutral/uncharged
b. Polar neutral/uncharged
c. Polar acidic/charged
d. Polar basic/charged
👀 The side chains are highlighted in yellow. These amino acids contains neutral hydrophobic side chains that consist of carbon and hydrogen atoms, except for Methionine which has a sulfur atom.
👀 The side chain of these polar amino acids have nitrogen, oxygen, or sulfur atom with electron pairs that play a role in hydrogen bonding to other water molecules
👀 Charged amino acids:
Charged (acidic) amino acids contain a carboxylic acid- COOH (or carboxylate) group in the side chain. This is in addition to the one in the backbone of the amino acid.
Charge (basic) amino acids contain an amine- NH2 (may be neutral or charged) group in the side chain (R group). This is in addition to the one in the backbone of the amino acid.
Zwitterion
Zwitterion
👁️🗨️ Watch the video to learn about amino acids as examples of Zwitterions.
Think about your answers to the following questions after watching the video:
What does zwitterion mean?
Describe how an amino acid behaves in water to form a zwitterion.
🖊️Check Your Understanding: Learning Goals Checkpoint
🖊️Check Your Understanding: Learning Goals Checkpoint
Attempt Q5- 6 of Proteins Learning Goals
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