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May 1, 1988The Journal of Cell BiologyOpen Access

The organization of titin filaments in the half-sarcomere revealed by monoclonal antibodies in immunoelectron microscopy: a map of ten nonrepetitive epitopes starting at the Z line extends close to the M line.

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Population

Relaxed chicken breast muscle

Design

Preclinical

Authors

DFDieter O. FürstHeart Failure & TransplantMOMary OsbornGoethe University FrankfurtRNRüdiger NaveMax Planck Society

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Implication

Clarifies titin polarity in sarcomeres; extends structural models while leaving cardiac functional implications open.

Key Points

  • This research aims to characterize the organization of titin filaments in sarcomeres using monoclonal antibodies.
  • Immunoblotting and fluorescence microscopy to characterize mAbs for titin and nebulin.
  • Immunoelectron microscopy on relaxed chicken breast muscle to investigate titin epitope patterns.
  • Identification of ten distinct titin epitopes across various regions in the sarcomere.
  • Ten distinct titin antibodies produced unique transverse striping patterns in sarcomeres.
  • A linear epitope map was established with positions starting at the Z line and extending to near the M line.
  • Antibodies T20 and T21 specifically recognized the insoluble titin TI component at the Z line.

Structured PICO

P
Population
Relaxed chicken breast muscle
I
Intervention
Monoclonal antibodies specific for titin or nebulin
O
Outcome
Epitope mapping of titin and nebulin in the half-sarcomere

This study maps the organization of titin filaments in the half-sarcomere, demonstrating that titin molecules are polar structures spanning from the Z line to near the M line.

Cite This Study

Fürst et al. (1988) studied this question.

synapsesocial.com/papers/6a18aef1673175fe754ac729https://doi.org/10.1083/jcb.106.5.1563
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Also Consider

Synapse has enriched 4 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Titin: major myofibrillar components of striated muscle.1979 · 549 citations
  2. 2Connectin, an Elastic Protein of Muscle. Identification of “Titin” with Connectin11981 · 153 citations
  3. 3Studies on reconstitution of Z-disk. Z-nin, a new high molecular weight protein required for reconstitution of the Z-disk.1981 · 16 citations
  4. 4Nebulin and titin expression in Duchenne muscular dystrophy appears normal1987 · 19 citations