Highly conserved lipoprotein assembly in teleost and amphibian yolk-platelet crystals

Nature ◽  
1981 ◽  
Vol 289 (5795) ◽  
pp. 329-330 ◽  
Author(s):  
R. H. Lange
Keyword(s):  
Lipoprotein Assembly ◽  
Yolk Platelet

Lipoprotein assembly in Xenopus yolk-platelet crystals

Nature ◽  
1982 ◽  
Vol 295 (5846) ◽  
pp. 264-264 ◽  
Author(s):  
LEONARD J. BANASZAK ◽  
DOUGLAS H. OHLENDORF
Keyword(s):  
Lipoprotein Assembly ◽  
Yolk Platelet

scholarly journals Lipoprotein assembly in Xenopus yolk-platelet crystals (reply)

Nature ◽  
1982 ◽  
Vol 295 (5846) ◽  
pp. 264-264 ◽  
Author(s):  
R. H. LANGE
Keyword(s):  
Lipoprotein Assembly ◽  
Yolk Platelet

scholarly journals Human crypt intestinal epithelial cells are capable of lipid production, apolipoprotein synthesis, and lipoprotein assembly

2000 ◽  
Vol 41 (1) ◽  
pp. 12-22 ◽  
Author(s):  
Emile Levy ◽  
Jean-François Beaulieu ◽  
Edgard Delvin ◽  
Ernest Seidman ◽  
Wagner Yotov ◽  
...  
Keyword(s):  
Epithelial Cells ◽  
Intestinal Epithelial Cells ◽  
Lipid Production ◽  
Intestinal Epithelial ◽  
Lipoprotein Assembly

The utilization of yolk platelets by tissues of Xenopus embryos studied by a safranin staining method

Development ◽  
1965 ◽  
Vol 14 (2) ◽  
pp. 191-212
Author(s):  
G. G. Selman ◽  
G. J. Pawsey
Keyword(s):  
Electron Microscopy ◽  
Amino Acid ◽  
Chemical Analysis ◽  
Amino Acid Composition ◽  
Rana Pipiens ◽  
Staining Method ◽  
Peripheral Zone ◽  
Main Body ◽  
Yolk Platelet ◽  
Similar Amino Acid

The amphibian yolk platelet is a particular kind of food-reserve granule which may be easily recognized by microscopy and which is abundant in the cytoplasm of amphibian eggs and embryos. Wallace & Karasaki (1963) developed a method by which intact yolk platelets were isolated from eggs of Rana pipiens and were shown by electron microscopy to be practically free from other materials. Chemical analysis of such yolk platelets by Wallace (1963a, b) showed that the crystalline main body is made up of two components, a phosphoprotein of similar amino-acid composition to avian phosvitin and a lipoprotein similar to avian α-lipovitellin, the molecular proportions being 2 to 1 respectively. Surrounding this crystalline main body of the yolk platelet there is a granular peripheral zone which has been reported to contain both protein resembling histone (Horn, 1962) and polysaccharide (Ohno, Karasaki & Takata, 1964).

scholarly journals Bile Salt-stimulated Carboxyl Ester Lipase Influences Lipoprotein Assembly and Secretion in Intestine

2001 ◽  
Vol 277 (6) ◽  
pp. 4104-4109 ◽  
Author(s):  
R. Jason Kirby ◽  
Shuqin Zheng ◽  
Patrick Tso ◽  
Philip N. Howles ◽  
David Y. Hui
Keyword(s):  
Bile Salt ◽  
Lipoprotein Assembly

Recent findings in oogenesis of Drosophila melanogaster

Development ◽  
1977 ◽  
Vol 39 (1) ◽  
pp. 45-57
Author(s):  
F. Giorgi ◽  
J. Jacob
Keyword(s):  
Drosophila Melanogaster ◽  
Acid Phosphatase ◽  
Ovarian Development ◽  
Superficial Layer ◽  
Blood Proteins ◽  
Selective Hydrolysis ◽  
Internal Lining ◽  
Hydrolysis Of ◽  
Zinc Iodide ◽  
Yolk Platelet

The role played by the vitellogenic oocytes of Drosophila melanogaster in relation to the elaboration of material taken from the haemolymph is examined by ultrastructural cytochemistry. As revealed by the Gomori procedure, acid phosphatase occurs widely over the forming yolk platelets of the cortical and central ooplasm. A number of Golgi apparatuses in thecortical ooplasm are also positively stained with lead precipitates. With the proceeding of the ovarian development it becomes progressively more difficult to demonstrate cytochemically the enzyme over the yolk platelets. In stage 9–10 chambers the acid phosphatase is restricted to the so-called associated body, while the rest of the yolk platelet appears devoid of lead deposits. By using a osmium zinc iodide (OZ1) complex as a preferential staining method for the Golgi apparatus, it has been shown that, apart from the apparatus itself, a number of OZI deposits occur over the superficial layer of the forming yolk platelets. When mature yolk platelets are formed at later stages, the OZI deposits in the yolk platelets come to be restricted to the cap-like region of the superficial layer which contains the associated body. In vitellogenic oocytes, both the internal lining of the limiting membrane of the forming yolk platelets and the associated body of the mature yolk platelets react positively, to cytochemical methods to demonstrate carbohydrates. The present findings are interpreted as indicating the involvement of lysosomal enzymes in the process of maturation of the yolk material. The suggestion is also made that such an involvement is required to accomplish a selective hydrolysis of those blood proteins which have been taken in by vitellogenic oocytes along with yolk precursors.

scholarly journals AUP1 (Ancient Ubiquitous Protein 1) Is a Key Determinant of Hepatic Very-Low–Density Lipoprotein Assembly and Secretion

2017 ◽  
Vol 37 (4) ◽  
pp. 633-642 ◽  
Author(s):  
Jing Zhang ◽  
Mostafa Zamani ◽  
Christoph Thiele ◽  
Jennifer Taher ◽  
Mohsen Amir Alipour ◽  
...  
Keyword(s):  
Low Density Lipoprotein ◽  
Density Lipoprotein ◽  
Very Low Density Lipoprotein ◽  
Low Density ◽  
Lipoprotein Assembly
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