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Black Aspergillus is important fungus for oriental fermentation industry. Black Aspergillus was frequently isolated from Korean traditional Meju, a fermented soybean starting material for soy sauce and soybean paste. Thirty three strains were isolated from 98 finished Meju collected in various regions of Korea from 2008 to 2011, and 21 strains were isolated from in-process Meju at various farms from 2010 to 2011. The isolated black Aspergillus were identified using DNA sequences of partial β-tubulin and calmodulin genes. Of 54 black Aspergillus strains, 14 strains were identified as A. luchuensis and the others were composed of A. niger (n = 21), A. tubingensis (n = 10), and A. welwitschiae (n = 9).

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A hybrid RNA : DNA duplex in the A-form, with one of the oxygens in each phosphodieste.r group in the DNA strand substituted with sulphur (yellow). This is an energy-minimized structure generated using the BIOGRAF program on a Silicon Graphics Iris workstation (J. Jaroszewski and J. S. Cohen).

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