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protein and all other essential amino acids are satisfied, if the limiting amino acid is not satisfied, then the meal is considered to be nutritionally limited by that amino acid.

Overview

(*) Pyrrolysine, sometimes considered the "22nd amino acid", is not used by the human body.

Essentiality in humans

Of the twenty amino acids common to all life forms (not counting selenocysteine), humans cannot synthesize nine: histidine,

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