11. CLASSIFICATION OF AMINO ACID
Based on Structure
1.Amino acid with aliphatic side chain
2.Amino acid contain hydroxyl group
3.Sulfur contain amino acids
4.Amino acid and their amides
5.Basic amino acids
6.Aromatic amino acids
7.Imino acids
12.
13.
14.
15. Based on side chains
Hydrophobic. R group can be either of Alkyl groups (with an alkyl
chain) or Aromatic groups.
•Glycine (H)
•Alanine (CH3)
•Valine ( CH (CH3)2 )
•Methionine ( CH2CH2SCH3 )
•Leucine ( CH2CH(CH3)2 )
•Isoleucine ( -CH(CH3)CH2CH3 )
•Proline (special structure)
•Phenylalanine
•Tryptophan
1. Non-Polar Amino Acids
2. Polar Amino Acids
16. 2. Polar Amino Acids
side chains contain different polar groups like
amines, alcohols or acids
they are polar in nature. Hydrophilic Acids.
a) Acidic: carboxylic acid component these are acid-
polar amino acids.
•Aspartic Acid, Glutamic Acid
b) Basic: nitrogen group
•Histidine, Lysine, Arginine
c) Neutral: These are neither acidic nor basic. They
have an equal number of amino and carboxyl
groups.
Threonine, Asparagine, Glutamine, Cysteine,
Tyrosine
17. Amino acid can also be classified on the basis of their need
to the human body and their availability in the human body
1. Essential Amino Acids
These are the acids that cannot be synthesized in our
bodies. We must rely on food sources to obtain these
amino acids. They are
•Leucine, Isoleucine, Lysine, Theorine, Methionine,
Phenylalanine, Valine, Tryptophan, Histidine
2. Non-Essential
These acids are synthesized in our bodies itself and we
need not rely on outside sources for them. They are either
produced in our bodies or obtained from protein
breakdowns.
18.
19. The 3 Functions of BCAAs ( Branched Chain AA)
If you consume BCAAs before exercising and use them as a
source of energy, they will help you maintain your
performance. Their main functions are as follows.
1Compose 30-40% of the essential amino acids that make
up muscles
2Prevent muscle proteins from breaking down
3Used as an efficient energy source during exercise
