HELICAL ARRANGEMENT OF THE SUBUNITS OF THE NEUROFIBRILLAR BUNDLES ISOLATED FROM LEECH NERVOUS SYSTEM

Open Access
Publisher Website
Google Scholar
Abstract
Neurofibrillar bundles were isolated from the nervous system of the turtle leech (Macrobdella sp.) and stained negatively with 1% Na-phosphotungstate solution at pH 7.3. Electron microscopy of the preparations reveals a hierarchically ordered substructure. Heavily beaded filaments of about 40 A in diameter are associated in filamentous aggregates measuring mostly about 300 A in diameter. The filamentous aggregates are intertwined into larger superhelices and associated in different degrees into neurofibrillar bundles.