phosphagen


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phos·pha·gen

(fos'fă-jen),
Energy-rich guanidinium or amidine phosphate, serving as an energy store in muscle and brain; for example, phosphocreatine in mammals, phosphoarginine in invertebrates. Other phosphagens include phosphoagmatine, phosphoglycocyamine, and phospholombricine.

phosphagen

/phos·pha·gen/ (fos´fah-jen) any of a group of high-energy compounds, including phosphocreatine, that act as reservoirs of phosphate bond energy, donating phosphoryl groups for ATP synthesis when supplies are low.

phosphagen

(fŏs′fă-jĕn)
Several chemicals, including phosphocreatine, that release energy when split. They are high-energy phosphate compounds.

phosphagen

a type of chemical found in the muscles of all animals, whose function is to pass on high-energy phosphate to ADP to form ATP. Phosphagens thus act as energy-storage molecules and are especially useful when cellular respiration is not providing sufficient ATP molecules, for example when sudden muscular activity takes place. Phosphagens are of two types: creatine phosphate found in vertebrates and echinoderms, and arginine phosphate found in many other invertebrates.
References in periodicals archive ?
It is well established that, the postmortem energy metabolism or glycolysis (lactate) in muscle is highly relevant to the ultimate meat quality, and the muscle glycolytic flux early postmortem is mainly related to the phosphagen system and glycolytic enzymes activities [17].
the phosphagen pathway energy predominance) between sprints and jumps led to the assumption that these motor actions are highly related to each other in professional soccer players (13,18).
Also, anaerobic power is described as a capability to utilize an individual's phosphagen system in a high volume and short-term muscle activities and show an individual's maximal efficiency in the first seconds (Reiser, 2002).
The physiological requirements of bowling reveal that the muscle activity required is fuelled mainly by the phosphagen breakdown system (13).
Energy requirements for short-term maximal exercises are mostly obtained through the anaerobic glycolysis and phosphagen systems (9).
Power performance is highly dependent on the phosphagen energy system, which requires 4 min for replenishment after an intense exercise set (Harris et al.
The depletion of acetylcholine results in an interruption of the neural impulse to contract, and the phosphagen depletion reduces ATP and phosphocreatine.
The significant activation of the glycolytic pathway can be explained by the effort/pause ratio of 6:1 (effort: 117 s (65-150 s), pause: 20 [+ or -] 14 s) noted in this study, since the brief periods of pause are insufficient to fully restore the phosphagen system [36].
128) In fact, a temporary decrease in the content of ATP as well as that of phosphagen has been observed immediately after dilution.
This increase on day 1 may be due to the regeneration of ATP through the action of the adenylate kinase enzyme, or to the utilization of the phosphoarginine phosphagen in a reaction catalyzed by the arginine kinase enzyme, as has been reported for other species, such as the abalone Haliotis discus (Watanabe et al.
To keep it simple, there are three main metabolic pathways we use to perform physical activity--the phosphagen pathway, the glycolytic pathway, and the oxidative pathway--and one pathway to convert food into energy--the citric acid, or Krebs cycle.