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CONTRACTILE PROPERTIES OF COMPRESSED MONOLAYERS OF ACTOMYOSIN
1. Surface-spread actomyosin, compressed into fibers, shows biological properties of contractility and enzymic activity. 2. In unloaded contractions, wet and dry weight determinations show no appreciable water loss in contraction. The fibers also evince a strong ATP-ase activity. 3. A structural con...
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Formato: | Texto |
Lenguaje: | English |
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The Rockefeller University Press
1952
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2147365/ https://www.ncbi.nlm.nih.gov/pubmed/13011272 |
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author | Hayashi, Teru |
author_facet | Hayashi, Teru |
author_sort | Hayashi, Teru |
collection | PubMed |
description | 1. Surface-spread actomyosin, compressed into fibers, shows biological properties of contractility and enzymic activity. 2. In unloaded contractions, wet and dry weight determinations show no appreciable water loss in contraction. The fibers also evince a strong ATP-ase activity. 3. A structural continuity in the fibers by intermolecular linkages of the component actomyosin molecules is established during the formation of the fibers. Evidence includes their visible longitudinal structural organization, the lack of elongation effect of ATP when under tension, and their ability to lift appreciable loads, so that, like muscle, they can transform chemical energy into mechanical work. 4. Up to a limiting critical weight, the fibers perform more work with increasing imposed weight load. 5. Theoretical aspects are discussed, including the possibility that surface-spread protein is involved in the formation of cell structures. Possible explanations for the relative slowness of the fiber contractions are offered. |
format | Text |
id | pubmed-2147365 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 1952 |
publisher | The Rockefeller University Press |
record_format | MEDLINE/PubMed |
spelling | pubmed-21473652008-04-23 CONTRACTILE PROPERTIES OF COMPRESSED MONOLAYERS OF ACTOMYOSIN Hayashi, Teru J Gen Physiol Article 1. Surface-spread actomyosin, compressed into fibers, shows biological properties of contractility and enzymic activity. 2. In unloaded contractions, wet and dry weight determinations show no appreciable water loss in contraction. The fibers also evince a strong ATP-ase activity. 3. A structural continuity in the fibers by intermolecular linkages of the component actomyosin molecules is established during the formation of the fibers. Evidence includes their visible longitudinal structural organization, the lack of elongation effect of ATP when under tension, and their ability to lift appreciable loads, so that, like muscle, they can transform chemical energy into mechanical work. 4. Up to a limiting critical weight, the fibers perform more work with increasing imposed weight load. 5. Theoretical aspects are discussed, including the possibility that surface-spread protein is involved in the formation of cell structures. Possible explanations for the relative slowness of the fiber contractions are offered. The Rockefeller University Press 1952-11-20 /pmc/articles/PMC2147365/ /pubmed/13011272 Text en Copyright © Copyright, 1952, by The Rockefeller Institute for Medical Research This article is distributed under the terms of an Attribution–Noncommercial–Share Alike–No Mirror Sites license for the first six months after the publication date (see http://www.rupress.org/terms). After six months it is available under a Creative Commons License (Attribution–Noncommercial–Share Alike 4.0 Unported license, as described at http://creativecommons.org/licenses/by-nc-sa/4.0/). |
spellingShingle | Article Hayashi, Teru CONTRACTILE PROPERTIES OF COMPRESSED MONOLAYERS OF ACTOMYOSIN |
title | CONTRACTILE PROPERTIES OF COMPRESSED MONOLAYERS OF ACTOMYOSIN |
title_full | CONTRACTILE PROPERTIES OF COMPRESSED MONOLAYERS OF ACTOMYOSIN |
title_fullStr | CONTRACTILE PROPERTIES OF COMPRESSED MONOLAYERS OF ACTOMYOSIN |
title_full_unstemmed | CONTRACTILE PROPERTIES OF COMPRESSED MONOLAYERS OF ACTOMYOSIN |
title_short | CONTRACTILE PROPERTIES OF COMPRESSED MONOLAYERS OF ACTOMYOSIN |
title_sort | contractile properties of compressed monolayers of actomyosin |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2147365/ https://www.ncbi.nlm.nih.gov/pubmed/13011272 |
work_keys_str_mv | AT hayashiteru contractilepropertiesofcompressedmonolayersofactomyosin |