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What do economists mean when they say that "there is no free lunch"? Give another example to which this statement applies.
Phenylalanine
An essential amino acid with the formula C9H11NO2, known for its role in the biosynthesis of proteins and a precursor to neurotransmitters.
pH
A numeric scale used to specify the acidity or basicity of an aqueous solution, with values less than 7 being acidic and greater than 7 being basic.
Isoelectric Point
The pH at which a molecule or surface carries no net electrical charge, important in protein purification and characterization.
Highest pH
Refers to the most alkaline condition in a set of samples, indicating the lowest concentration of hydrogen ions.
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