scholarly journals Fresh and Frozen Egg Yolk Protein Fractions: Emulsion Stabilizing Power, Viscosity, and Electrophoretic Patterns

1969 ◽  
Vol 48 (1) ◽  
pp. 251-260 ◽  
Author(s):  
Elizabeth M. Davey ◽  
Mary E. Zabik ◽  
Lawrence E. Dawson
Keyword(s):  
Egg Yolk ◽  
Yolk Protein ◽  
Protein Fractions ◽  
Electrophoretic Patterns

ZONE ELECTROPHORESIS OF THE PROTEINS OF THE FOWL'S SERUM AND EGG YOLK

1959 ◽  
Vol 37 (12) ◽  
pp. 1457-1468 ◽  
Author(s):  
K. A. McCully ◽  
W. A. Maw ◽  
R. H. Common
Keyword(s):  
Saline Solution ◽  
Laying Hens ◽  
Egg Yolk ◽  
Yolk Protein ◽  
Protein Fractions ◽  
Zone Electrophoresis ◽  
The Status ◽  
Minor Protein ◽  
Protein Zone

In addition to the six protein fractions distinguishable in sera from cocks or sexually immature pullets by zone electrophoresis in aqueous veronal, two lipoprotein zones have now been distinguished in sera from laying hens or estrogenized pullets by this same technique. Phosvitin has been detected in serum of estrogenized hens by zone electrophoresis of a saline solution of crude serum lipovitellin obtained from the serum. Six protein zones have been distinguished in similar electropherograms of egg yolk. The six protein zones have been identified provisionally, and in order of decreasing mobility under the conditions used, as phosvitin, α-livetin, β-livetin, γ-livetin, lipoprotein P-1 (possibly a lipovitellenin complex), and lipoprotein P-2 (possibly a lipovitellin complex). Evidence is submitted that the foregoing two major lipoprotein zones from egg yolk are closely similar to, or identical with, the two lipoprotein zones from sera of laying hens or estrogenized pullets. The status of a seventh minor protein zone in electropherograms of yolk protein is uncertain.

ZONE ELECTROPHORESIS OF THE PROTEINS OF THE FOWL'S SERUM AND EGG YOLK

1959 ◽  
Vol 37 (1) ◽  
pp. 1457-1468 ◽  
Author(s):  
K. A. McCully ◽  
W. A. Maw ◽  
R. H. Common
Keyword(s):  
Saline Solution ◽  
Laying Hens ◽  
Egg Yolk ◽  
Yolk Protein ◽  
Protein Fractions ◽  
Zone Electrophoresis ◽  
The Status ◽  
Minor Protein ◽  
Protein Zone

In addition to the six protein fractions distinguishable in sera from cocks or sexually immature pullets by zone electrophoresis in aqueous veronal, two lipoprotein zones have now been distinguished in sera from laying hens or estrogenized pullets by this same technique. Phosvitin has been detected in serum of estrogenized hens by zone electrophoresis of a saline solution of crude serum lipovitellin obtained from the serum. Six protein zones have been distinguished in similar electropherograms of egg yolk. The six protein zones have been identified provisionally, and in order of decreasing mobility under the conditions used, as phosvitin, α-livetin, β-livetin, γ-livetin, lipoprotein P-1 (possibly a lipovitellenin complex), and lipoprotein P-2 (possibly a lipovitellin complex). Evidence is submitted that the foregoing two major lipoprotein zones from egg yolk are closely similar to, or identical with, the two lipoprotein zones from sera of laying hens or estrogenized pullets. The status of a seventh minor protein zone in electropherograms of yolk protein is uncertain.

VIEWPOINT. An hypothesis to explain the linkage between kakapo (Strigops habroptilus) breeding and the mast fruiting of their food trees

2008 ◽  
Vol 35 (1) ◽  
pp. 1 ◽  
Author(s):  
Andrew E. Fidler ◽  
Stephen B. Lawrence ◽  
Kenneth P. McNatty
Keyword(s):  
Egg Yolk ◽  
Ovarian Follicles ◽  
Yolk Protein ◽  
Egg Laying ◽  
Food Plants ◽  
Mast Seeding ◽  
Future Research ◽  
Yolk Protein Genes ◽  
Hypothetical Mechanism ◽  
Future Research Directions

An important goal in the intensive conservation management of New Zealand’s critically endangered nocturnal parrot, kakapo (Strigops habroptilus), is to increase the frequency of breeding attempts. Kakapo breeding does not occur annually but rather correlates with 3–5-year cycles in ‘mast’ seeding/fruiting of kakapo food plants, most notably podocarps such as rimu (Dacrydium cupressinum). Here we advance a hypothetical mechanism for the linking of kakapo breeding with such ‘mast’ seeding/fruiting. The essence of the hypothesis is that exposure to low levels of dietary phytochemicals may, in combination with hepatic gene ‘memory’, sensitise egg yolk protein genes, expressed in female kakapo livers, to oestrogens derived from developing ovarian follicles. Only in those years when the egg yolk protein genes have been sufficiently ‘pre-sensitised’ by dietary chemicals do kakapo ovarian follicles develop to ovulation and egg-laying occurs. While speculative, this hypothesis is both physiologically and evolutionarily plausible and suggests both future research directions and relatively simple interventions that may afford conservation workers some influence over kakapo breeding frequency.

Unusual Electrophoretic Patterns of Plasma Proteins in Human Subjects

1961 ◽  
Vol 7 (2) ◽  
pp. 107-114 ◽  
Author(s):  
Eugene L Kanabrocki
Keyword(s):  
Plasma Proteins ◽  
Human Subjects ◽  
Protein Fractions ◽  
Normal Adult ◽  
Globulin Fraction ◽  
Specific Disease ◽  
Double Peaks ◽  
Electrophoretic Patterns ◽  
Beta Globulin

Abstract Study of 313 plasma electrophoretic patterns from 158 hospitalized subjects revealed that 30 per cent of these patients exhibited a heterogeneity marked by occurrence of double peaks in the alpha-2 and 6 per cent in the beta globulin fraction. Occurrence of double peaks could not be related to any specific disease. Similar study of plasma from 18 normal adult subjects did not reveal double peaks in any of the protein fractions. Existence of prealbumin components, with mobilities greater than that of the albumin, has been observed in 6 of 158 pathological subjects. Mobilities and concentrations of components x1, x2, and x3 are reported.

Extraction of Lipid-Protein Complexes from Egg Yolk

1972 ◽  
Vol 55 (5) ◽  
pp. 975-978
Author(s):  
J G Navarro ◽  
F Borie ◽  
J Saavedra
Keyword(s):  
Fatty Acids ◽  
Solvent Extraction ◽  
Enzymatic Hydrolysis ◽  
Free Fatty Acids ◽  
Protein Complexes ◽  
Egg Yolk ◽  
Yolk Protein ◽  
Residual Lipid ◽  
Mode Of Attachment ◽  
Hydrolysis Of

Abstract A residual lipid which is not removed by solvent extraction was detected and determined after enzymatic hydrolysis of defatted egg yolk protein. Free fatty acids were found to be the type of lipid bonded to the egg yolk protein. The mode of attachment of these fatty acids to the egg yolk protein is suggested and the composition of the fatty acids is reported.

Egg yolk protein as a novel wall material used together with gum Arabic to encapsulate polyphenols extracted from Phoenix dactylifera L pits

LWT ◽  
2020 ◽  
Vol 131 ◽  
pp. 109778
Author(s):  
Chiraz Ben Sassi ◽  
Ismael Marcet ◽  
Manuel Rendueles ◽  
Mario Díaz ◽  
Sami Fattouch
Keyword(s):  
Gum Arabic ◽  
Egg Yolk ◽  
Phoenix Dactylifera ◽  
Yolk Protein ◽  
Wall Material ◽  
Phoenix Dactylifera L

Firebugs fight infection with egg yolk protein

2019 ◽  
Vol 222 (10) ◽  
pp. jeb206185
Author(s):  
Kathryn Knight
Keyword(s):  
Egg Yolk ◽  
Yolk Protein
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