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. 1972 Sep;69(9):2542–2546. doi: 10.1073/pnas.69.9.2542

Individual States in the Cycle of Muscle Contraction

Cristobal G Dos Remedios *, Ralph G Yount †, Manuel F Morales *
PMCID: PMC426984  PMID: 4341699

Abstract

By using appropriate analogs of ATP, isometrically-held glycerol-extracted psoas fibers from rabbits are forced successively into states corresponding to molecular species in the contractile cycle. In each state measurements are made of P[unk], a fluorescence polarization parameter thought to relate to attitude of S-1 moieties of the myosin molecules. Also, the value of P[unk] is measured during active tension development. It is suggested that this value is a time-average of the P[unk] as S-1 moieties move through the various states of the cycle. Proposals are made concerning the sequence of states in the cycle.

Keywords: psoas, rabbit, ATP analogs, myosin

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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