In this study, we explored the pathogenic effects of white spot syndrome virus (WSSV) and effects of yeast cell wall in the red claw crayfish, Cherax quadricarinatus, by investigating the activity of enzymes related to innate immune function following artificial infection of immunized and non-immunized crayfish. Our results reveal that the activity of four enzymes, phenoloxidase (PO), peroxidas...

since most of the studies on chemical compounds of dermatophytes have shown the existence of a relationship between their pathogenisity and proteolytec enzymes. activities of 19 different enzymes in viable mycelia and cytoplasmic extracts of t.rubrum (cetr), t.mentagrophytes (cetm) and t.verrucosum (cetv) were investigated by the api-zym system. the results showed that viable mycelia of t.rubrm...

The ability of Legionella pneumophila to act as a recipient of IncP and IncQ plasmids in matings with Escherichia coli varies widely from strain to strain. We found that the low efficiency of mating of the Philadelphia-1 strain is due to a type II restriction-modification system, and we isolated and characterized a Philadelphia-1 mutant that lacks the restriction enzyme activity.

this study was carried out to determine the potential of rumen microorganisms in samples taken from slaughterhouse to produce fibrolytic enzymes and to compare different methods for extraction, concentration and conservation of them.  according to the results, the average specific activity of cellulase and xylanase were 7.5 and 16.5 u/mg protein respectively. the application of homogenizing and...

We study how crowding affects the activity and catalysis-enhanced diffusion of enzymes passive tracers by employing a fluctuating-dumbbell model conformation-changing enzymes.

The Cytochromes P450 are heme-thiolate enzymes that carry out selective oxyfunctionalization of a wide range substrates using molecular dioxygen and two reducing equivalents provided by redox partner enzymes. Alternative approaches to activate have received recent attention in an attempt circumvent the use partners cofactors. In particular, light-harvesting units has proven useful triggering ac...