amino acid classification

• Which amino acids are positively charged/basic?

  Lysine, Arginine, Histidine.
• Which amino acids are non-polar/aliphatic?

  Glycine, Alanine, Valine, Leucine, Isoleucine, Methionine, Proline, Cysteine.
• Which amino acids are negatively charged/acidic?

  Aspartic acid, Glutamic acid.
• Which amino acids are aromatic?

  Phenylalanine, Tyrosine, Tryptophan.
• Which amino acids are polar and uncharged?

  Serine, Threonine, Asparagine, Glutamine, Tyrosine.