Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 1974 May;61(2):501-13.
doi: 10.1083/jcb.61.2.501.

Freeze fracture of skeletal muscle from the Tarantula spider. Structural differentiations of sarcoplasmic reticulum and transverse tubular system membranes

C Franzini-Armstron

Freeze fracture of skeletal muscle from the Tarantula spider. Structural differentiations of sarcoplasmic reticulum and transverse tubular system membranes

C Franzini-Armstron. J Cell Biol. 1974 May.

Abstract

The structure of the membranes of sarcoplasmic reticulum (SR), tubular (T) system, and sarcolemma has been studied by freeze fracture in leg muscles of the Tarantula spider. Two regions of the sarcoplasmic reticulum can be differentiated by the distribution of particles on the fracture faces: a junctional SR, at the dyads, and a longitudinal SR, elsewhere. The dyads are asymmetric junctions, the disposition of particles in the apposed membranes of SR and T tubules being different from one another and from the regular arrangement of feet in the junctional gap. It is concluded that no channels can be visualized to directly connect SR- and T-system lumina.

PubMed Disclaimer

Similar articles

See all similar articles

Cited by

See all "Cited by" articles

References

    1. Pharmacol Rev. 1965 Sep;17(3):265-320 - PubMed
    1. Proc Natl Acad Sci U S A. 1966 May;55(5):1048-56 - PubMed
    1. J Ultrastruct Res. 1967 Mar;17(5):598-622 - PubMed
    1. J Electron Microsc (Tokyo). 1968;17(2):158-9 - PubMed
    1. J Cell Biol. 1969 Jan;40(1):269-73 - PubMed