摘要:
A method for DNA reassembly after random fragmentation, and its application to mutagenesis of nucleic acid sequences by in vitro or in vivo recombination is described. In particular, a method for the production of nucleic acid fragments or polynucleotides encoding mutant proteins is described. The present invention also relates to a method of repeated cycles of mutagenesis, shuffling and selection which allow for the directed molecular evolution in vitro or in vivo of proteins.
摘要:
A high angle light scattering detector using classical Rayleigh scattering. A high intensity arc light source, filtered to leave only one wavelength illuminates a flow cell. Through the flow cell, very small particles such as biological proteins flow in solution after separation by HPLC or some other means. A UV detector generates data regarding the weight concentration of the eluting particles and a scattered light detector collecting scattered light at angles of approximately 90° generates a scattered light signal. The incident light intensity is also measured. The average molecular weight is then computed using the scattered and incident light data, the weight concentration data and a simplified mathematical relationship from which the size factor P and the viral coefficients have been eliminated.
摘要:
The invention provides genetic suppressor elements that confer the transformed phenotype of malignant mammalian cells upon untransformed cells, methods for identifying and obtaining such elements, methods for isolating and identifying genes corresponding to such elements, and methods of using such elements. The invention also provides genes corresponding to the GSEs of the invention.
摘要:
Methods for obtaining cells that produce a ligand for an orphan receptor and methods for preparing polynucleotide molecules that encode ligands for orphan receptors are disclosed. The methods utilize growth factor-dependent parent cells that are transfected with a DNA construct encoding an orphan receptor. The transfected cells are exposed to mutagenizing conditions, and the mutagenized cells are cultured under conditions in which cell survival is dependent upon autocrine growth factor production. Progeny cells are recovered and screened to identify those that produce a ligand for the orphan receptor. Polynucleotide molecules encoding the ligand can be prepared from the identified cells.
摘要:
A method of inhibiting corneal scarring or haze, especially produced as a result of laser surgery of a patient, comprises administering to the patient an amount of a compound, e.g., cis-hydroxyproline, which modifies the structure of collagen.
摘要:
Thrombus or clot formation and accretion are inhibited by administering thrombin-displacing substances to a patient. The thrombin-displacing substances comprise either thrombin analogs which bind to the thrombin-binding site on fibrin or fibrin analogs which bind to a fibrin-binding site on thrombin. By displacing the thrombin from clot or thrombus, the thrombin is released into circulation where it is inactivated by endogenous anti-proteinases. The fibrin analogs which bind to the fibrin-binding site on thrombin may be linked to a second binding moiety which binds to and/or inactivates the catalytic site and/or exosite I on thrombin to further inhibit thrombosis. The ability of test substances to displace thrombin is measured by exposure of the substance to immobilized thrombin-fibrin complex.
摘要:
The invention provides a transgenic bovine species capable of producing a recombinant polypeptide in at least one cell type of said animal. Other aspects include transgenes for the production of such animals, milk resulting therefrom and the use of such milk and heterologous polypeptides contained within such milk.
摘要:
Methods and pharmaceutical compositions for the treatment of dermatitis are disclosed. 2,3-diaryl-1-benzopyrans and their pharmaceutically acceptable salts are formulated into medicaments, including oral and topical medicaments, which are administered to a patient suffering from dermatitis. The methods and compositions are particularly useful in the treatment of conditions characterized by hyperproliferation of keratinocytes, such as psoriasis.
摘要:
Unsubstituted or substituted 5-iodo-6-amino-1,2-benzopyrones and their analogs are potent, selective and non-toxic inhibitors and suppressants of cancer growth and viral infections in a mammalian host. The compounds are particularly useful for treatment and suppression of tumors and viruses associated with AIDS, herpetic episodes and cytomegaloviral infections.
摘要:
Novel, heterocyclic cationic amphiphile and compounds thereof are prepared that are degraded in vivo. Liposomes are produced from the cations that are used as carriers for delivering macromolecules intracellularly and may be targeted to a specific cell type.