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. 1973 Sep 1;58(3):630–642. doi: 10.1083/jcb.58.3.630

THE STRUCTURE OF A SIMPLE Z LINE

Clara Franzini-Armstrong 1
PMCID: PMC2109064  PMID: 4583880

Abstract

The structural simplicity of the Z line in fish muscle fibers allows direct visualization of its basic geometry. Models which postulate termination of the I filaments at the edges of the Z line and the direct linkage of I filaments belonging to the two adjacent sarcomeres by Z filaments crossing the whole width of the Z line give the best fit to the electron micrographs. The structure of fish Z lines is not significantly altered by the use of different fixation procedures and by changes in sarcomere length.

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Selected References

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