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Glucose 6-phosphate dehydrogenase in rainbow trout
Biochemical Genetics
|April 1, 1976
Summary
Electrophoretic analysis revealed genetic variation in glucose 6-phosphate dehydrogenase (G6PD) in rainbow trout. This enzyme variation is likely due to two alleles at a single locus, with NADH binding influencing the complex patterns observed.
Area of Science:
- Biochemistry
- Genetics
- Aquaculture
Background:
- Glucose 6-phosphate dehydrogenase (G6PD) is a crucial enzyme in cellular metabolism.
- Understanding enzyme polymorphism is vital for fish breeding and population genetics.
Purpose of the Study:
- To investigate the electrophoretic patterns of G6PD in rainbow trout.
- To identify genetic variants and understand the basis of observed enzyme complexity.
Main Methods:
- Electrophoretic analysis of G6PD from rainbow trout liver and blood.
- Enzyme inactivation studies at pH 8.4.
- Population analysis of 40 fish to identify alleles.
Main Results:
- A complex series of G6PD bands was observed, varying between individual fish.
- Evidence of partial interconversion of enzyme bands was found.
- A single locus with two alleles, including a variant, was identified in the fish population.
Conclusions:
- G6PD expression in rainbow trout is controlled by two alleles at a single locus.
- Posttranslational modification, potentially involving NADH binding, explains the complex electrophoretic patterns.
- The identified genetic variation has implications for rainbow trout genetics and breeding programs.
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