Over het archief
Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.
Dit archief wordt uitgebouwd en beheerd volgens de principes van de Open Access Movement, en het daaruit ontstane Open Archives Initiative.
Basisinformatie over ‘Open Access to scholarly information'.
Parabolic pattern of a peculiar striated body in the tunic of the ascidian Halocynthia papillosa (Tunicate, Ascidiacea)
Van Daele, Y.; Gaill, F.; Goffinet, G. (1991). Parabolic pattern of a peculiar striated body in the tunic of the ascidian Halocynthia papillosa (Tunicate, Ascidiacea). J. Struct. Biol. 106(2): 115-124. https://dx.doi.org/10.1016/1047-8477(91)90081-7
In: Journal of structural biology. ACADEMIC PRESS INC ELSEVIER SCIENCE: San Diego, Calif.. ISSN 1047-8477; e-ISSN 1095-8657, meer
|  |
| Auteurs | | Top |
- Van Daele, Y.
- Gaill, F.
- Goffinet, G., meer
|
|
|
| Abstract |
Numerous extracellular striated bodies (SBs) are found in the basal region of the tunic of the ascidian Halocyrethia papillosa SBs appear as flattened ellipsoid globules (0.8 × 1.3 μm), the long axes of which run parallel to the cellulose fiber bundles of the tunic. SBs are made of a twisted arrangement of cylindrical fibrils that exhibit an electron-lucent core 6.5 nm in diameter, limited by an electron-dense sheath 1.5 nm in thickness. Unlike helicoidal systems described in other extracellular matrices, SBs are discrete and discontinuous plywoods. They are unique structures owing to the 390-nm periodical succession of isotropic and anisotropic layers and to the π/3 twist angle of the fibrils. The chemical composition of SBs is unknown. However, histochemical, immunostaining, contrasting, and goldlabeling methods suggest that they are at least partially composed of proteins and made of a composite material different from collagen, cellulose and glycosaminoglycans. The origin of SBs may be interpreted as a phase segregation between their own constitutive materials and tunical cellulose. Their distribution pattern correlates closely with the degree of disorganization of the helicoidal cellulose system. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
