The lipoprotein crystals in yolk platelets of a shark, Squalus ocanthias (Selachii).
Folia Histochem Cytobiol
; 31(3): 139-45, 1993.
Article
in En
| MEDLINE
| ID: mdl-8262269
ABSTRACT
Lipovitellin-phosvitin crystals in yolk platelets from the egg of a shark, Squalus ocanthias (Selachii), were studied by the selected area electron diffraction method. Ultra-thin sections of yolk platelets possess an orthorhombic lattice with lattice parameters a = 8.0 nm, b = 15.9 nm, and c = 18.1 nm. Comparative and quality analysis of the reflection intensities of electron diffraction patterns between shark and other vertebrate yolk platelets suggest evolutionary variability of the lipovitellin structure. The lattice and its parameters, however, are highly conserved. The results of the present study fill the last gap in the comparative yolk platelet research which has been carried out over many years for exponents of all vertebrate taxonomic groups, from cyclostomes to reptiles.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Oocytes
/
Egg Proteins, Dietary
/
Phosvitin
/
Dogfish
/
Egg Yolk
Limits:
Animals
Language:
En
Journal:
Folia Histochem Cytobiol
Journal subject:
HISTOCITOQUIMICA
Year:
1993
Document type:
Article
Affiliation country:
Poland