Amino acids 2

Amino acids 2

1. classification according to polarity of side chain

   • I-with non polar or hydrophobic (R)
     • 1-glycine
     • 2-Alanine
     • 3-valine
     • 4-leucine
     • 5-isoleucine
     • 6-Methionine
     • 7-phenylalanin
     • 8-tryptophane
     • 9-proline
   • II-uncharged but polar
     • 1-serine ,threonine,tyrosine,hydroxyproline
     • 2-cysteine
     • 3-Asparagine and g;utamine
   • III-with charged (R)groups
     • Basic
       • 1-lysine ..hydroxy lysine
       • 2-Arginine
       • 3-Histidine
     • Acidic
       • 1-aspartic acid
       • 2-glutamic acid

2. Nutritional classification

   • essintial amino acids
     • 2-leucine
     • 3-isoleucine
     • 4-threonine
     • 5-Methionine
     • 6-lysine
     • 7-phenylalanine
     • 8-tryptophane
     • 9-histidine
     • 1-valeine
   • half essential amino acids
     • Arginine only one
   • Non - essential amino acids
     • rest of A.A

3. Metabolic classification

   • 1-pure glucogenic A.A
     • rest of a,a
   • 3-Glucogenic and Ketogenic (mixed) A.A
     • tyrosine
     • tryptophane
     • isoleucine
     • phenylalanine
   • 2-pure Ketogenic A.A
     • leucine
     • lysine