摘要:
A novel and improved method for purification of glycopeptides, especially glycopeptide antibiotics. The method comprises contacting a solution of the glycopeptide to an ion exchange chromatography material. The product of this method has a surprisingly high purity.
摘要:
The invention provides methods and apparatus for the selective isolation of phosphorylated and glycosylated proteins and their fragments. Metal cation is used to precipitate proteins or protein fragments containing phospho groups and/or glyco groups. The sample preparation method can be used for several types of biological samples, including HeLa cells, food, and human cerebrospinal fluid. The proteins are isolated, recovered and ready for analysis by mass spectrometry or other analytical methods allowing detection limits down to the femtomole level. The method and apparatus are valuable tools in the field of protein analysis and diagnostics.
摘要:
The present invention relates to methods for the separation of various components from eggs. More particularly, the present invention relates to methods for the separation of proteins and lipids from eggs, including technical eggs (inedible) or edible eggs, yolks or whites, which comprises cross-linking the lipids of eggs with a cross-linking reagent. In an embodiment, the method includes separating the proteins from the cross-linked lipids. In an embodiment, the method includes the separation of various components associated with the cross-linked lipids. The methods disclosed herein allow for the isolation of multiple different components from the egg in an efficient, cost-effective manner without compromising the recovery process of the components or their subsequent utility in various applications or compositions. The compositions and isolated components obtained by the methods of the invention can be used in pharmaceutical, medical, nutritional, cosmetic or health applications.
摘要:
The present invention relates to a method for separating protein from food by using an iso-electric point precipitation, comprising: obtaining a protein extract by adjusting pH of a raw material food in a media; precipitating the protein by adjusting pH of the protein extract to an iso-electric point of the desired protein; and recovering the protein precipitated after separating a protein filtrate through centrifuging the precipitated protein; in which the method may further include a heat-precipitation of the protein by heating the protein extract or the protein filtrate to 60˜145° C. The protein obtained in high yield according to the above method can be used as a food additive or a food nutritional enhancer.
摘要:
The present invention is directed to a pharmaceutical composition comprising F(ab′)2 antibody fragments that are preferably free from albumin and of whole antibodies and also substantially free of pyrogens, and an effective amount of a pharmaceutically acceptable carrier. It is also directed to a method for the production of a pharmaceutical composition comprising F(ab′)2 antibody fragments using serum or blood plasma of a mammal that has been previously immunized as a source of antibodies. The serum or blood plasma is digested with an enzyme pepsin, followed by separation and purification until the pharmaceutical composition of F(ab′)2 fragments is free of albumin and complete antibodies, and substantially free of pyrogens.
摘要:
The invention provides methods for isolating proteins in purified form from mixtures by precipitation with citrate. The methods are advantageous in that they effectively separate a protein from lower molecular weight contaminants, including fragments or portions of the protein. Such methods are particularly useful for purifying antibodies from mixtures containing antibody proteolytic fragments and unpaired chains.
摘要:
The present invention relates to a method for precipitation of peptide where the mixing step of the peptide with the precipitation aid and the precipitation itself are specially separated.
摘要:
A method of preparing a coagulated plant protein fraction with a medium molecular weight of between 14 to 97, by providing fruit juice in aqueous solution; precipitating a high-molecular-weight plant protein fraction whose bulk has a molecular weight of from above 100 to 600, by adjusting an acidic pH and/or a temperature above room temperature, and mechanically separating the fraction precipitated thus; precipitating a medium-molecular-weight coagulated plant protein fraction under warm conditions by treating, at pH 2 to 7, and between 60 to 90° C., the solution obtained after separation of the high-molecular-weight plant protein fraction and mechanically separating the medium-molecular-weight coagulated plant protein fraction with a molecular weight of between approximately 14 to 97, with the bulk of the molecular weight distribution being between 20 to 60. The plant protein fraction is usable as foodstuff, food additive, additive in pharmaceuticals, animal feed, in cosmetics, as industrial protein, as adhesive.
摘要:
The present invention is related to a method of isolating a biological macromolecule in a composition. Specifically, the present invention is related to a method of isolating a biomacromolecule in a composition containing an impurity, the method comprising adding a polyalkylene glycol to the composition, adding a transition metal to the composition, and separating said biomacromolecule from said impurity.
摘要:
A process suitable for processing scaled-up amounts of source material in the range of tens of kilograms for the purification of alpha-1 proteinase inhibitor (API) from a mixture of unpurified proteins is provided. More particularly, a process for the purification of API from blood plasma or from plasma fractions to obtain pharmaceutical grade API on a commercial scale is provided. The API produced by the process is highly pure (at least 90% API out of the total protein) and highly active (at least 90% active API). Pharmaceutical compositions comprising the purified API and methods of using same are also described.