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DAN (uncountable)

  1. (biochemistry) Acronym of deadenylating nuclease, a protein that binds the 5' cap of mRNA and begins degradation in the 3' to 5' direction.
  2. (space science, NASA) Acronym of Dynamic Albedo of Neutrons. (It is a scientific instrument of the Mars Science Laboratory onboard the Curiosity rover at Mars.)

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