A circannual study of tyrosine aminotransferase and other metabolic enzymes in frog liver is reported. The subcellular distribution of all enzymatic activities under investigation was also studied. Results show significant oscillations of all enzymatic activities throughout the year; in particular tyrosine aminotransferase has a marked summer maximum. The subcellular distribution of tyrosine aminotransferase shows significant variations: the soluble activity of the enzyme presents a bimodal circannual distribution, which has its counterpart in an increased activity of heavier fractions
The developmental patterns of the enzymes involved in the metabolic degradation of tyrosine in rat L...
Green-striped burrowing frogs (Cyclorana alboguttata) can depress their resting metabolism by more t...
<p>The data were obtained at 7 mmol/L tyrosine (a) and after 48 h (b). The signals in the figure ind...
A subcellular fractionation procedure for frog liver is reported and validated by the distribution ...
This work demonstrates the presence of a tyrosinase-like activity in the pigment cells of frog Rana ...
It has been known for many years that the metabolism of the frog is subject to seasonal variations. ...
Various enzymes are known to be involved in melanin biosynthesis, but the key role appertains to tyr...
With a view to make biochemical comparison the author studied the transamination of various amino ac...
There are a few experimental data concerning the seasonal variations of metabolism in Amphibian. Les...
Seasonal variation of liver glycogen, lipids and melanomacrophages were investigated in a non-hibern...
Amphibian tyrosinases display unique and poorly understood properties such as seasonal activity vari...
1. The liver of female frogs shows a significantly higher dolichol content in May (134 micrograms/g)...
1. Phosphorylase activity has been assayed in liver extracts of the frog, Rana esculenta, during the...
Although seasonal metabolic variation in ectothermic tetrapods has been investigated primarily in th...
Natriuretic peptides (NPs), a family of structurally related hormones and nitric oxide (NO), generat...
The developmental patterns of the enzymes involved in the metabolic degradation of tyrosine in rat L...
Green-striped burrowing frogs (Cyclorana alboguttata) can depress their resting metabolism by more t...
<p>The data were obtained at 7 mmol/L tyrosine (a) and after 48 h (b). The signals in the figure ind...
A subcellular fractionation procedure for frog liver is reported and validated by the distribution ...
This work demonstrates the presence of a tyrosinase-like activity in the pigment cells of frog Rana ...
It has been known for many years that the metabolism of the frog is subject to seasonal variations. ...
Various enzymes are known to be involved in melanin biosynthesis, but the key role appertains to tyr...
With a view to make biochemical comparison the author studied the transamination of various amino ac...
There are a few experimental data concerning the seasonal variations of metabolism in Amphibian. Les...
Seasonal variation of liver glycogen, lipids and melanomacrophages were investigated in a non-hibern...
Amphibian tyrosinases display unique and poorly understood properties such as seasonal activity vari...
1. The liver of female frogs shows a significantly higher dolichol content in May (134 micrograms/g)...
1. Phosphorylase activity has been assayed in liver extracts of the frog, Rana esculenta, during the...
Although seasonal metabolic variation in ectothermic tetrapods has been investigated primarily in th...
Natriuretic peptides (NPs), a family of structurally related hormones and nitric oxide (NO), generat...
The developmental patterns of the enzymes involved in the metabolic degradation of tyrosine in rat L...
Green-striped burrowing frogs (Cyclorana alboguttata) can depress their resting metabolism by more t...
<p>The data were obtained at 7 mmol/L tyrosine (a) and after 48 h (b). The signals in the figure ind...