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The presynaptic active zones in three different types of fibres in frog muscle






Proceedings of the Royal Society of London. Series B, Biological Sciences 221(1224): 369-373

The presynaptic active zones in three different types of fibres in frog muscle

Presynaptic active zones were studied in slow, fast and intermediate types of frog muscle fibres in freeze-fracture replicas. In fast fibres, the double rows of paired particles are present on active zone ridges perperdicular to the longitudinal axis of the nerve whereas in slow fibres active zone ridges are rudimentary or absent and double rows of particles occur in all directions, mostly paired, sometimes single. In the intermediate type of muscle fibres both types of active zone deployment coexist on a single muscle fibre.


Accession: 044714448

PMID: 6146141

DOI: 10.1098/rspb.1984.0038



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