Organic Chemistry

Learn the toughest concepts covered in Organic Chemistry with step-by-step video tutorials and practice problems by world-class tutors.

26. Amino Acids, Peptides, and Proteins

Amino Acid Chart

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Are you ready to learn the 20 amino acids?! Let's get started. 

1

concept

Nonpolar Amino Acids

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There are 6 amino acids in the polar side-chain category. Let's learn them!

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Polar Amino Acids

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5 more! In the following video we will learn the 2 acidic and 3 basic side chains for amino acids. 

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Charged Amino Acids

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There are 9 essential amino acids. Let's dive deeper into their meaning.

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Essential Amino Acids

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Major props if you made it this far. Below we will use the tips and tricks learned above to fill in a blank chart and do some practice problems. Let's do this. 

5

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Blank Amino Acid Worksheet

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6
Problem

Non-Polar Sidechains - Fill in the missing sidechains on the following target tripeptide.

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Problem

Non-Polar Sidechains - Fill in the missing sidechains on the following target tripeptide.

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Problem

Non-Polar Sidechains - Provide the complete structure of the tripeptide P-F-W

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Problem

Polar Sidechains - Provide the Fischer Projection of Glutamine (Q)

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Problem

Polar Sidechains - Provide the complete structure of the dipeptide Asn-Cys

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Problem

Polar Sidechains - Fill in the missing sidechains on the following target oligopeptide.

Note:While the structure of Asparagine is correctly drawn at position #5 in the above video. The abbreviation "N" actually belongs to Asparagine, not Arginine.

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12
Problem

Acidic/Basic Sidechains - Provide the Fischer Projection of Amino Acid (H)

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Acidic/Basic Sidechains - Fill in the missing sidechains on the following target oligopeptide.

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Acidic/Basic Sidechains - Provide the complete structure of the oligopeptide V-I-D-Y. Based on your knowledge of hydrophobicity, which side of the peptide is more likely bury itself within the protein?