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Ultrastructural relationship of cell envelope layers in Wolinella recta
Author(s) -
KEROSUO EERO,
HAAPASALO MARKUS,
LOUNATMAA KARI
Publication year - 1989
Publication title -
european journal of oral sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.802
H-Index - 93
eISSN - 1600-0722
pISSN - 0909-8836
DOI - 10.1111/j.1600-0722.1989.tb01430.x
Subject(s) - ultrastructure , cell envelope , cleavage (geology) , layer (electronics) , electron microscope , membrane , biophysics , intramembranous ossification , chemistry , materials science , anatomy , composite material , biology , optics , fracture (geology) , physics , biochemistry , gene , escherichia coli
– The cell envelope of Wolinella recta was studied by electron microscopy. In thin sections the surface layer (S‐layer) seemed to be in close contact to the outer membrane (OM). A hexagonally arranged pattern of the S‐layer was revealed by freeze‐etching. Unlike in other oral bacteria with an S‐layer, the cleavage occurred along the S‐layer by freeze‐fracture, suggesting an exceptionally tight relationship between the two outermost layers. The convex surface of the S‐layer was usually revealed by this technique. When cleavage occurred through the outer membrane, no periodicity was seen in the arrangement of the intramembranous particles.