The gene nmrA of Aspergillus nidulans has been isolated and found to be a homolog of the Neurospora crassa gene nmr-1, involved in nitrogen metabolite repression. Deletion of nmrA results in partial derepression of activities subject to nitrogen repression similar to phenotypes observed for certain mutations in the positively acting areA gene.

Enumerates the question and answer about Liquid Nitrogen Level

A mechanism to generate an alarm should be present in all cryogenic storage units in case established temperature ranges are exceeded.

This article will explain why it is imperative that careful filling protocol be followed.

Liquid Nitrogen Storage and Cryogenic Freezers

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