摘要:
The present invention relates to a tumor suppressor gene, termed large tumor suppressor (lats), and methods for identifying tumor suppressor genes. The method provides nucleotide sequences of lats genes, and amino acid sequences of their encoded proteins, as well as derivatives (e.g., fragments) and analogs thereof. In a specific embodiment, the lats protein is a human protein. The invention further relates to fragments (and derivatives and analogs thereof) of lats which comprise one or more domains of a lats protein. Antibodies to lats, its derivatives and analogs, are additionally provided. Methods of production of the lats proteins, derivatives and analogs, e.g., by recombinant means, are also provided. Therapeutic and diagnostic methods and pharmaceutical compositions are provided. The invention also relates to recombinant plants and animals and methods of increasing the growth of edible plants and animals. In specific examples, isolated lats genes, from Drosophila, mouse, and human, and the sequences thereof, are provided.
摘要:
A method for transforming Cephalosporium and other lower eukaryotes is disclosed. The method involves inserting a recombinant DNA cloning vector comprising a Saccharomyces cerevisiae transcriptional and translational activating sequence positioned for expression of hygromycin phosphotransferase into a host cell and then growing the host cell under selective conditions. The vectors optionally further comprise Cephalosporium ribosomal DNA and also sequences that allow for replication and selection in E. coli and Streptomyces.
摘要:
A new process for cultivating selected cultures involves initially removing broth at a first rate from a fermentation and replacing it with supporting medium, the replacement rate thereafter being increased to remove cultures of lower growth rate than the selected culture. A new process for the microbiological synthesis of protein-containing material by an aerobic fermentation in a supporting medium uses a normally gaseous hydrocarbon substrate selected from nethane, ethane, propane and butane and a protein-producing fungus of graphium species. It has not been known hitherto for such syntheses to be possible with a fungus. The said substrate may be natural gas.
摘要:
A method is described for the detection of anti-streptokinase antibodies in a sample which comprises detection of a complex between lactate dehydrogenase, streptokinase, and antistreptokinase antibodies. The method is useful for the detection of antistreptokinase antibodies in the serum of patients prior to clinical streptokinase administration.
摘要:
CEPHALOSPORIN C, WHICH IS USEFUL AS A STARTING MATERIAL IN THE PREPARATION OF THE SEMI-SYNTHETIC CEPHALOSPORIN ANTIBIOTICS, IS PRODUCED BY THE AEROBIC CULTIVATION OF A NOVEL MICROORGANISM, CEPHALOSPORIUM SP. STRAIN F. 12 (ATCC 20339). THE CULTIVATION IS PERFORMED IN A NUTRIENT MEDIUM CONTAINING ASSIMILABLE SOURCES OF CARBON AND NITROGEN, ONE OR MORE INORGANIC SALTS, AND AN ORGANIC SOURCE OF SULFUR. HIGH YIELDS OF CEPHALOSPORIN C ARE OBTAINED, WITH REDUCED YIELDS OF THE UNDESIRABLE BY-PRODUCT CEPHALOSPORIN N, BY COMPARISON WITH PREVIOUSLY USED CEPHALOSPORIUM STRAINS.
摘要:
A method for producing cephalosporin C, which comprises culturing a microorganism belonging to a hitherto undiscovered species of the genus Cephalosporium so that cephalosporin C may be accumulated in the culture medium, then recovering so accumulated cephalosporin C from the culture broth. Thus, a new species was established by the present inventors and named as Cephalosporium polyaleurum.
摘要:
The invention relates to a new enzyme or urate oxidase which is very active in promoting oxidation of uric acid to allantoin. The urate oxidase is produced by fermentation under aerobic conditions of nutrient media containing sources of assimilable carbon, assimilable nitrogen and uric acid which have been seeded with suitable cultures of bacteria, fungi or yeasts. Isolation and purification of the urate oxidase is described.