What are the 4 categories of amino acids based on side chain structure? Which amino acids belong to each category?
1) Polar amino acids, Nonpolar amino acids, Acidic amino acids, Basic amino acids
2) Hydrophobic amino acids, Hydrophilic amino acids, Acidic amino acids, Basic amino acids
3) Polar amino acids, Nonpolar amino acids, Neutral amino acids, Acidic amino acids
4) Hydrophobic amino acids, Hydrophilic amino acids, Neutral amino acids, Acidic amino acids