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This research investigates how various phosphate compounds affect rigor contraction in glycerinated flight and vertebrate muscles.

Rigor contraction and the effect of various phosphate compounds on glycerinated insect flight and vertebrate muscle

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Randomized trial explores rigor contraction in glycerinated muscles, indicating how phosphate compounds affect muscle tension.

This research investigates how various phosphate compounds affect rigor contraction in glycerinated flight and vertebrate muscles.
Examined glycerol-extracted flight muscle from Lethocerus cordofanus under ATP-depleted conditions.
Measured tension and shortening under isometric and isotonic conditions at varying temperatures.
Analyzed the effects of pyrophosphate, ADP, AMP, and inorganic orthophosphate on muscle properties.
Rigor contractions produced tensions up to 120 mN/mm² under isometric conditions.
Adding 0.3 to 1 mM ATP fully relaxed rigor muscle, while less concentration resulted in partial relief.
Rabbit psoas muscle exhibited similar mechanical properties and rigor contraction responses in the presence of calcium chelators.

David C. White (1970) studied this question.

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