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Extracellular amylase production by the moderate halophile Halomonas meridiana was optimized and the enzyme was characterized biochemically. The highest amylase production was achieved by growing H. meridiana cultures in media with 5% salts and starch, in the absence of glucose until the end of the exponential phase. The amylase exhibited maximal activity at pH 7.0, being relatively stable in alkaline...
A native promoter located on the cryptic plasmid pHE1 from the moderate halophile Halomonas elongata was identified employing a promoterless ice nucleation gene inaZ of Pseudomonas syringae by direct subcloning and assaying for ice nucleation activity. The presence of the promoter was verified by inserting the corresponding intact or deleted pHE1 fragment in the promoter analysis vector pKK232-8 upstream...
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