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Scientists tested three theories as to why gene order within operons doesn't appear to be random when it comes to the order of enzymes needed in metabolic pathways. Studying E. coli and "employing deterministic and stochastic models of enzyme kinetics," the Hungarian researchers found that the theory of stochastic stalling -- if an operon is not often expressed, then all the proteins for this part of metabolism can be lost -- is supported.

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Two COVID-19 vaccine developers have released their trial protocols to build public trust, the New York Times reports.

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