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Lego Principle

(principle that life is associated with a skew in molecule abundances)

The Lego Principle is an informal name for the idea that life is made up of a relatively small set of molecules that life tends to assemble, so the presence of life will skew molecule Abundances away from the distributions seen without life. Earth life consists of several Amino Acids, Nucleotides, Sugars, and Lipids, and the common building blocks allow life to interact.