| Literature DB >> 1317881 |
K E Loesser1, L Castellani, C Franzini-Armstrong.
Abstract
The structure and disposition of the feet occupying the junctions between sarcoplasmic reticulum (SR) and surface membrane/transverse tubules were studied in muscles from a variety of invertebrates. Feet were imaged by rotary shadowing of isolated junctional SR vesicles and by filtering of micrographs from grazing views of the junction in thin sections. The overall size and shape of invertebrate feet is the same as that of feet in skeletal and cardiac muscle of vertebrates. However, the arrangement of feet in invertebrate muscles differs from that in vertebrates. These findings are discussed in terms of known variations in properties of excitation-contraction coupling of the two phyla.Entities:
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Year: 1992 PMID: 1317881 DOI: 10.1007/BF01874153
Source DB: PubMed Journal: J Muscle Res Cell Motil ISSN: 0142-4319 Impact factor: 2.698