aliphatic amino acids
The naturally occurring amino acids with aliphatic side chains are glycine, alanine, valine, leucine and isoleucine.

Dictionary of molecular biology. 2004.

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  • Essential amino acid — An essential amino acid or indispensable amino acid is an amino acid that cannot be synthesized de novo by the organism (usually referring to humans), and therefore must be supplied in the diet. Contents 1 Essentiality vs. conditional… …   Wikipedia

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