scholarly journals Genetic and Biochemical Studies of Phosphatase Activity of PhoR

2003 ◽  
Vol 185 (3) ◽  
pp. 1112-1115 ◽  
Author(s):  
Daniel O. Carmany ◽  
Kristine Hollingsworth ◽  
William R. McCleary
Keyword(s):  
Escherichia Coli ◽  
Phosphatase Activity ◽  
Histidine Kinase ◽  
Deletion Mutants ◽  
Biochemical Activity ◽  
Biochemical Studies ◽  
Histidine Phosphorylation ◽  
Phosphorylation Domain ◽  
Phosphate Regulon

ABSTRACT In Escherichia coli, PhoR is the histidine kinase of the phosphate regulon. It has been postulated that PhoR may function as a phospho-PhoB phosphatase. Experiments with four precise phoR deletion mutants supported this hypothesis and suggested that this activity resides within the histidine phosphorylation domain. This biochemical activity was confirmed by using a separately expressed histidine phosphorylation domain.

Physiological studies on trematodes: phosphatase systems in Gastrothylax crumenifer

Parasitology ◽  
1966 ◽  
Vol 56 (1) ◽  
pp. 105-110 ◽  
Author(s):  
Madan M. Goil
Keyword(s):  
Acid Phosphatase ◽  
Phosphatase Activity ◽  
Acid Phosphatase Activity ◽  
Maximum Activity ◽  
Fluoride Ions ◽  
Gastrothylax Crumenifer ◽  
Biochemical Studies ◽  
Physiological Studies ◽  
Phosphatase Enzyme

Biochemical studies on the phosphatase systems of Gastrothylax crumenifer have been made. The maximum activity of the phosphatase enzyme was found to be at 5 pH. The action of magnesium and fluoride ions on the acid phosphatase activity shows that both act as inhibitors. The day-to-day variation in the phosphatase activity of the samples, as measured by block differences, was found to be significant at different pH levels. The heat denatured extract showed low and fairly constant acid phosphatase activity.

scholarly journals Characterization and Antibiogram of Escherichia coli Associated with Mortality in Broilers and Ducklings in Bangladesh

1970 ◽  
Vol 2 (1) ◽  
pp. 9-14 ◽  
Author(s):  
MT Islam ◽  
MA Islam ◽  
MA Samad ◽  
SML Kabir
Keyword(s):  
Escherichia Coli ◽  
Antibiotic Sensitivity ◽  
High Rate ◽  
E Coli ◽  
Sensitivity Pattern ◽  
Highly Sensitive ◽  
Biochemical Studies ◽  
Increasing Trend ◽  
Escherichia Coli Infection ◽  
Hemorrhagic Enteritis

Mortality in broilers (6.56%) and growing ducks (11.0%) caused by Escherichia coli was recorded in the experimental flocks study during the period from May to August 2003. E. coli organisms isolated from broiler birds affected with characteristic lesions of omphalitis and yolk sac infection, fibrinous pericarditis and peri-hepatitis , hemorrhagic enteritis, and accumulation of excessive pericardial and peritoneal fluid, whereas from ducks with lesions of hemorrhagic enteritis and extensive epicardial hemorrhages. Each of the 21 isolates collected from broilers and 11 isolates from ducks was characterized by cultural and biochemical studies, of which 8 isolates from broilers and 5 isolates from ducks were tested for antibiotic sensitivity with 9 different antibiotics. The antibiotic sensitivity pattern showed that the isolates were highly sensitive to ciprofloxacin but an increasing trend of resistance was recorded in broilers (7 / 9) than duck (4 / 9) isolates. It may be concluded from the results of this study that the high rate of E. coli infection in broilers and ducks along with the high resistance of isolates to antibiotics constitute a threat to the poultry industry in Bangladesh. Key words: Escherichia coli infection; mortality; broilers; ducks; characterization; antibiogram doi: 10.3329/bjvm.v2i1.1927 Bangl. J. Vet. Med. (2004). 2 (1) : 09-14

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