Wiese TJ, Lambeth DO, Ray PD. The intracellular distribution and activities of phosphoenolpyruvate carboxykinase isozymes in various tissues of several mammals and birds.
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. B, COMPARATIVE BIOCHEMISTRY 1991;
100:297-302. [PMID:
1799972 DOI:
10.1016/0305-0491(91)90378-q]
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Abstract
1. The intracellular distribution and/or activities of phosphoenolpyruvate carboxykinase isozymes were determined in liver, kidney, gastrointestinal mucosa, adipose, skeletal muscle, brain, spleen, lung and heart of fed and fasted rabbits, guinea pigs, rats, chickens and pigeons. 2. Liver and kidney of all species contained the highest enzyme activity/g. 3. Carboxykinase activity/g gastrointestinal mucosa of rabbits was quite high compared to the low activity in guinea pig and rat mucosa and essentially undetectable activity in chicken and pigeon mucosa. 4. Activity/g was high in rat brown adipose. 5. Low carboxykinase activity/g was found in skeletal muscle of all species and in white adipose of guinea pig, rabbit and rat although activity was undetectable in white adipose of chicken and pigeon. 6. Carboxykinase activity was essentially undetectable in brain, spleen, lung and heart of all species.
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