Difference between Essential and
nonessential amino
acids
Proteins are made up of simple units called amino acids.
Amino acids absorbed from food are used
to synthesize structural proteins (cell membrane proteins),
functional proteins (enzymes), protein
hormones, carrier protein etc. proteins are essential for
growth, development and tissue repair.
Essential amino
acids
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nonessential
amino acids
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1. Cannot be synthesized in the animal body
2. It should be obtained from the diet ( therefore
called as essential amino acids)
3. Essential amino acids are Arginine (Arg/R),
Histidine (His/H), Isoleucine (Ile/I), Leucine (Leu/L), Lysine
(Lys/K), Methionine (Met/M), Phenylalanine (Phe/F),
Threonine (Thr/T), Tryptophan (Trp/W), and Valine
(Val/V).
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1. Can be synthesized in the animal body
2. It can be synthesised in the body (therefore
called as non-essential amino acids)
3. Non-essential amino acids are Alanine (Ala/A),
Asparagine (Asn/N), Aspartate (Asp/D), Cysteine
(Cys/C), Glutamate (Glu/E), Glutamine (Gln/Q), Glycine
(Gly/G), Proline (Pro/P), Serine(Ser/S),
Tyrosine(Tyr/Y).
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