DOI: 10.1083/jcb.13.2.323. THE ULTRASTRUCTURE OF THE Z DISC IN SKELETAL MUSCLE

THE ULTRASTRUCTURE OF THE Z DISC IN SKELETAL MUSCLE

10.1083/jcb.13.2.323

Crossref journal-article

Rockefeller University Press

The Journal of Cell Biology (291)

Abstract

This electron microscopic study deals with the structure of the Z disc of frog's skeletal muscle, with special regard to the I filaments—whether they pass through the Z disc or terminate at it. In most longitudinal sections the I filaments terminate as rod-like projections on either side of the Z disc, one I filament on one side lying between two I filaments on the opposite side. This indicates that the I filaments are not continuous through the Z disc. The rod-like projections are often seen to consist of filaments (denoted as Z filaments) which meet at an angle. In cross-sections through the Z region the I filaments and Z filaments form tetragonal patterns. The I filaments are situated in the corners of the squares; the oblique Z filaments form the sides of squares. The tetragonal pattern formed by the Z filaments is rotated 45 degrees with respect to the tetragons formed by the I filaments on both sides of Z. This structural arrangement is interpreted to indicate that each I filament on one side of the Z disc faces the center of the space between four I filaments on the opposite side of Z and that the interconnection is formed by four Z filaments.

Bibliography

Knappeis, G. G., & Carlsen, F. (1962). THE ULTRASTRUCTURE OF THE Z DISC IN SKELETAL MUSCLE. The Journal of Cell Biology, 13(2), 323â335.

Authors 2

G. G. Knappeis (first)
F. Carlsen (additional)

References 0 Referenced 149

None

Dates

Type	When
Created	21 years, 3 months ago (May 14, 2004, 1:40 p.m.)
Deposited	2 years, 1 month ago (July 22, 2023, 1:58 a.m.)
Indexed	28 minutes ago (Sept. 4, 2025, 2:59 a.m.)
Issued	63 years, 4 months ago (May 1, 1962)
Published	63 years, 4 months ago (May 1, 1962)
Published Online	63 years, 4 months ago (May 1, 1962)
Published Print	63 years, 4 months ago (May 1, 1962)

Funders 0

None

BibTeX

@article{Knappeis_1962, title={THE ULTRASTRUCTURE OF THE Z DISC IN SKELETAL MUSCLE}, volume={13}, ISSN={0021-9525}, url={http://dx.doi.org/10.1083/jcb.13.2.323}, DOI={10.1083/jcb.13.2.323}, number={2}, journal={The Journal of Cell Biology}, publisher={Rockefeller University Press}, author={Knappeis, G. G. and Carlsen, F.}, year={1962}, month=may, pages={323–335} }

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