Gene Technology

The gene multiplication method with plasmid vectors has been applied to the breeding of amino acid producers. When a plasmid vector that can multiply within an amino acid producer is joined enzymatically to a DNA fragment carrying the genetic information from other strains of the same microorganism or other microorganisms, the resultant recombinant DNA is transferred to the amino acid producer to introduce new markers of the donor microorganisms. A plasmid such as pCGll has sites sensitive to various restriction endonucleases and is easily joined to a DNA fragment prepared by digestion with corresponding restriction enzymes. Moreover, because it has the genes determining streptomycin resistance, it is easy to select strains with plasmids carrying these antibiotic resistance markers (40).

Sleeping Sanctuary

Sleeping Sanctuary

Salvation For The Sleep Deprived The Ultimate Guide To Sleeping, Napping, Resting And  Restoring Your Energy. Of the many things that we do just instinctively and do not give much  of a thought to, sleep is probably the most prominent one. Most of us sleep only because we have to. We sleep because we cannot stay awake all 24 hours in the day.

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