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After screening the samples that Raufman prepared, they discovered exendin-4, a peptide molecule composed of 39 amino acids
Extended exposure above refrigeration temperatures degrades the peptide over time
Fatty-acid side chains and other structural modifications can complicate both synthesis and downstream purification
When NAPQI levels are higher than the livers capacity to neutralize, NAPQI will form protein adducts on the mitochondria of liver cells
These invisible transformations may add years to a man life and life to a man years
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