IgY Purification via Precipitation and Extraction
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Solution Overview
Problem
Current methods for purifying immunoglobulin Y (IgY) from chicken egg yolk are costly and inefficient, resulting in low yields and stability, making it difficult to produce high-purity IgY at an industrial scale while maintaining high activity and competitive pricing.
Innovation Solution
A process involving the precipitation of the egg yolk lipid fraction, followed by liquid-liquid extraction using aqueous biphasic systems to remove higher molecular weight contaminants, and ultrafiltration to remove lower molecular weight contaminants and polymers, achieving 95% purity and high stability of IgY.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional precipitation methods are used to separate IgY from water-soluble proteins, then the purification process is simple and economical, but the obtained IgY has low purity and low yield
Solution Approach 1:
The purification process is divided into three distinct stages: (1) separation of water-soluble proteins from lipid fraction through dilution and centrifugation, (2) isolation of IgY from other soluble proteins using selective precipitation with ammonium sulfate, and (3) final purification through dialysis and chromatography. This segmentation allows each step to optimize for specific purification goals, achieving 95% purity while maintaining industrial applicability
Solution Approach 2:
Ammonium sulfate is used as an intermediary substance to selectively precipitate IgY from the aqueous fraction. The salt induces selective precipitation of IgY at specific concentrations (30-70% saturation), allowing separation from other water-soluble proteins while maintaining IgY activity and enabling scalable purification
2Manufacturing precision
If chromatographic techniques are used to separate IgY from other soluble proteins, then high purity IgY can be obtained, but the production cost significantly increases
Solution Approach 1:
The method utilizes changes in salt concentration (ammonium sulfate saturation from 30-70%) and pH conditions to control selective precipitation of IgY. By optimizing these parameters, the process achieves chromatography-level purity (95%) through precipitation, avoiding the need for expensive chromatographic resins and equipment while maintaining high purification efficiency
Solution Approach 2:
The process replaces expensive, complex chromatographic systems with inexpensive, scalable precipitation methods using common chemicals like ammonium sulfate. The simple dialysis membranes and centrifugation equipment used are low-cost alternatives to expensive chromatography systems, making high-purity IgY production economically viable at industrial scale
3Manufacturing precision
If successive precipitation with organic solvents is used to separate water-soluble proteins from lipid fraction, then separation can be achieved, but the yield of IgY becomes significantly low
Solution Approach 1:
The method exploits phase transition by diluting egg yolk with water to create an aqueous environment where proteins become soluble while lipids remain insoluble. Subsequent centrifugation separates the aqueous phase (containing IgY) from the lipid fraction, achieving efficient separation without organic solvents and preserving IgY yield through gentle phase separation
Solution Approach 2:
The high lipid content (50% dry matter, 2/3 lipids) of egg yolk, which traditionally complicates purification, is converted into a beneficial separation feature. By diluting with water, the lipids naturally separate as an insoluble phase that can be easily removed by centrifugation, while the desired IgY remains in the aqueous phase, turning the lipid complexity into a separation advantage
4Manufacturing precision
If egg yolk is diluted in water to separate water-soluble proteins from lipid fraction, then the aqueous fraction containing IgY can be obtained, but further purification becomes complex and costly
Solution Approach 1:
The method performs preliminary selective precipitation of IgY from the aqueous fraction using ammonium sulfate before final purification steps. This preliminary action concentrates IgY and removes other water-soluble proteins early in the process, simplifying subsequent dialysis and chromatography steps while maintaining high purity and reducing overall process complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The process enables the production of high-purity, high-stability IgY at a competitive price, suitable for industrial-scale applications, with improved activity compared to existing methods and commercial kits.
Implementation Method 1
extracting the antibody from said aqueous fraction by means of a biphasic aqueous solution, wherein the biphasic aqueous solution comprises a polymer and a saline buffer forming two immiscible phases
Implementation Method 2
ultrafiltration of the immiscible phase from the previous step, wherein the immiscible phase comprises the polymer and the antibody in order to obtain the purified antibody
Implementation Method 3
The first step corresponds to the precipitation of the egg yolk lipid fraction
Data Source
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AI summary
The present disclosure relates to a process for purifying immunoglobulin Y (IgY) from egg yolk, in particular from chicken egg yolk, with high purity, high stability and high activity, and at a competitive price. The present process makes it possible to obtain approximately 95% pure IgY in a simple, economical and industrially applicable manner.