Concept #1: Memorizing Charged Amino Acids

Concept #2: Negatively Charged Amino Acids

Concept #3: Positively Charged Amino Acids

Concept #4: Grouping Charged Amino Acids as Acids or Bases

Practice: Draw in the R-groups from memory for each of the charged amino acids at physiological pH.

Practice: Fill-in the missing R-groups for the following peptide from memory: H-E-K. Circle the acidic amino acids.

Practice: Which of the following amino acids does not have a basic R-group?

Practice: Circle all the following amino acids with a basic R-group?