摘要:
A method for the concentration and purification of biomolecules is described and comprises introducing the biomolecule into an aqueous/organic solvent system and bringing about a phase separation by addition of salts, where the pH at which the concentration takes place, the solvents suitable for the aqueous/organic solvent system, and the nature of the salt are determined in a series of tests one embodiment concerns concentration of hirudin by using propanol, butanol or acetone a the solvent and sodium chloride as the salt.
摘要:
The present invention relates to a fusion protein comprising IGF-I or an IGF-I variant N-terminally linked to the C-terminus of a propeptide. The invention relates also to a method involving the use of the aforementioned fusion protein in the production of a lysine-PEGylated IGF-I or IGF-I variant. The method comprises the steps of cultivating a prokaryotic host cell comprising an expression vector containing a nucleic acid encoding the fusion protein and causing the cell to express the fusion protein, recovering and PEGylating said fusion protein, cleaving said PEGylated fusion protein with IgA protease, and recovering lysine-PEGylated IGF-I or IGF-I variant. The invention relates also to a lysine-PEGylated IGF-I or IGF-I variant produced using the above method. In addition, the invention relates to a method for treating a neurodegenerative disorders like Alzheimer's Disease using the lysine-PEGylated IGF-I or IGF-I variant and a composition comprising the lysine-PEGylated IGF-I or IGF-I variant.
摘要:
The present invention provides a crystal suitable for X-ray diffraction, comprising a complex of insulin-like growth factor I or II (IGF) and a polypeptide consisting of the amino acids 39-91 of IGFBP-1, the amino acids 55-107 of IGFBP-2, the amino acids 47-99 of IGFBP-3, the amino acids 39-91 of IGFBP-4, the amino acids 40-92 of IGFBP-5, or the amino acids 40-92 of IGFBP-6 or a fragment thereof consisting at least of the 9th to 12th cysteine of IGFBP-1, IGFBP-2, IGFBP-3, IGFBP-4, or IGFBP-5 or at least of the 7th to 10th cysteine of IGFBP-6; methods for the determination of the atomic coordinates of such a crystal; IGFBP mutants with enhanced binding affinity for IGF-I and/or IGF-II, and methods to identify and optimize small molecules which displace IGFs from their binding proteins.
摘要:
A hedgehog conjugate which is characterized in that it contains: a) a polypeptide composed of 10 to 30 hydrophobic amino acids and/or amino acids which form transmembrane helices and are positively charged, b) 1 to 4 aliphatic, saturated or unsaturated hydrocarbon residues with a chain length of 10 to 24 C atoms and with a hydrophobic action or c) a hydrophobic thio compound covalently bound to a hedgehog protein and which has a several-fold increased activity and is suitable as a pharmaceutical agent.
摘要:
In the case of an open-end spinning arrangement, a spinning rotor is arranged in a rotor housing, to which a vacuum of at least 500 mm water column is applied. A fibre feed channel, beginning at an opening roller with an entry opening, is directed with an outlet opening at a sliding wall of the spinning rotor. The fibre feed channel bends slightly in the direction towards a fibre collecting groove of the spinning rotor. The cross sectional area of the outlet opening of the fibre feed channel measures at least 19 mm.sup.2 and amounts to at least 30% of the cross sectional area of the entry opening. As a result of the bend in the fibre feed channel, the fibres are collected together in a fibre bundle on a longitudinal side of the fibre feed channel. The fibre bundle occupies only a part area of the outlet opening when leaving the fibre feed channel and is fed with high precision onto the sliding wall. The outlet opening can thus have larger dimensions without this leading to inaccurate feeding of the fibres. The outlet opening possesses dimensions that permit a large volume of air to flow at high speed from the opening roller through the fibre feed channel. Fly accumulation in the area of the opening roller is thus avoided.
摘要:
A feeding and opening device for open-end spinning units comprises a feeding roller and a feed table resiliently urged against the feeding roller for feeding a sliver to an opening roller, as well as at least one mechanical supporting element that is located at a spacing from a guide edge of the feed table, while leaving a free space that is open towards the atmosphere between the guide edge and the at least one mechanical supporting element. In accordance with preferred embodiments, the supporting element may be formed of at least one strip located essentially in parallel to an axis of rotation of the opening roller, or at least one row of needles arranged with their free ends directed towards the opening roller.
摘要:
Method for the production of IGF-I, characterized by cultivating a prokaryotic host cell comprising an expression vector containing a nucleic acid encoding a fusion protein comprising said IGF-I N-terminally linked to the C-terminus of a propeptide, whereby said propeptide ends C-terminally with amino acids -Y-Pro, wherein Y is selected from the group consisting of Pro, Pro-Ala, Pro-Gly, Pro-Thr, Ala-Pro, Gly-Pro, Thr-Pro, Arg-Pro, or Pro-Arg-Pro, recovering and cleaving said fusion protein with IgA protease, and recovering said IGF-I. IGF-I is useful for the treatment of neurodegenerative disorders like Alzheimer's Disease.
摘要:
The present invention relates to a fusion protein comprising IGF-I or an IGF-I variant N-terminally linked to the C-terminus of a propeptide. The invention relates also to a method involving the use of the aforementioned fusion protein in the production of a lysine-PEGylated IGF-I or IGF-I variant. The method comprises the steps of cultivating a prokaryotic host cell comprising an expression vector containing a nucleic acid encoding the fusion protein and causing the cell to express the fusion protein, recovering and PEGylating said fusion protein, cleaving said PEGylated fusion protein with IgA protease, and recovering lysine-PEGylated IGF-I or IGF-I variant. The invention relates also to a lysine-PEGylated IGF-I or IGF-I variant produced using the above method. In addition, the invention relates to a method for treating a neurodegenerative disorders like Alzheimer's Disease using the lysine-PEGylated IGF-I or IGF-I variant and a composition comprising the lysine-PEGylated IGF-I or IGF-I variant.
摘要:
A hedgehog conjugate which is characterized in that it contains: a) a polypeptide composed of 10 to 30 hydrophobic amino acids and/or amino acids which form transmembrane helices and are positively charged, b) 1 to 4 aliphatic, saturated or unsaturated hydrocarbon residues with a chain length of 10 to 24 C atoms and with a hydrophobic action or c) a hydrophobic thio compound covalently bound to a hedgehog protein and which has a several-fold increased activity and is suitable as a pharmaceutical agent.
摘要:
A conjugate consisting of an insulin-like growth factor-1 (IGF-I) variant and one or two poly(ethylene glycol) group(s), characterized in that said IGF-I variant has an amino acid alteration at up to three amino acid positions 27, 37, 65, 68 of the wild-type IGF-I amino acid sequence so that one or two of said amino acids is/are lysine and amino acid 27 is a polar amino acid but not lysine, is conjugated via the primary amino group(s) of said lysine(s) and said poly(ethylene glycol) group(s) have an overall molecular weight of from 20 to 100 kDa is disclosed. This conjugate is useful for the treatment of neurodegenerative disorders like Alzheimer's Disease.