Characterization of a chelator-resistant proteinase from Thermus strain Rt4A2

Purification and initial characterization of RNA polymerase from Thermus thermophilus strain HB8.

Utilizing a novel and rapid two-column purification procedure, the DNA-dependent RNA polymerase (RNAP) from the thermophile, Thermus thermophilus HB8, was purified to electrophoretic homogeneity with a recovery of 65% (as determined by RNAP activity) in less than 2 days. The purified enzyme was characterized using DNA containing the lambdaP(R) promoter. KMnO(4) footprinting, abortive initiation...

Characterization of an a-Amylase with Broad Temperature Activity from an Acid-Neutralizing Bacillus cereus Strain

Bacillus sp. GUF8, isolated from acidic soil samples of a tea farm was identified as Bacillus cereus, based on 16S rDNA sequencing and standard bacterial identification methods. Following optimization of enzyme production, the resulting α-amylase was purified by acetone precipitation and ion exchange chromatography. Consequently, thermostability and kinetic parameters of the purified enzyme wer...

Purification and Characterization of the Recombinant Thermus sp. Strain T2 a-Galactosidase Expressed in Escherichia coli

Characterization of aflatoxigenic Aspergillus flavus and A. parasiticus strain isolates from animal feedstuffs in northeastern Iran

Aflatoxins are secondary toxic metabolites produced by some Aspergillus spp. particularly, Aspergillus flavus and A. parasiticus that contaminate food and feed. The objective of this study was to evaluate the contamination of feedstuffs with Aspergillus spp. and detect genes involved in the aflatoxin biosynthesis pathway of A. flavus and A. parasiticus isolates. A total of 110 cow feed samples ...

Purification and characterization of an acidic, thermophilic phytase from a newly isolated Geobacillus stearothermophilus strain DM12

Microbial phytases were applied mainly to animal and human foodstuffs in order to improvemineral bioavailability and food processing. In addition, phytases have potentialbiotechnological application in various other fields, such as environmental protection,aquaculture and agriculture. Bacillus sp. DM12, an isolate from a hot spring, produces phytase,which catalyzes the hydrolysis of phytic acid...