Patents Represented by Attorney, Agent or Law Firm Bertram Rowland
  • Patent number: 7135325
    Abstract: Short enzyme donor fragments of ?-galactosidase are provided of not more than 40 amino acids, where the short fragments are used as a label and may be substituted with a wide variety of organic compounds, particularly polypeptides having independent functional activity. The enzyme donor finds use in competitive and non-competitive assays, monitoring intracellular events, or other processes where a sensitive non-interfering label is desired.
    Type: Grant
    Filed: April 24, 2003
    Date of Patent: November 14, 2006
    Assignee: DiscoveRx, Inc.
    Inventors: Tabassum Naqvi, Rajendra Singh, Riaz Rouhani
  • Patent number: 6770451
    Abstract: Systems, including methods and reagents, for identifying enzyme inhibitors. The systems employ a conjugate of a known inhibitor of a target enzyme and an enzyme donor, an enzyme acceptor that binds to the enzyme donor to form an active indicator-enzyme complex, and a detectable substrate for the indicator enzyme. The assay is performed by combining the candidate agent, the conjugate of the known inhibitor and enzyme donor, the enzyme acceptor, and the substrate under binding conditions, where the candidate compound competes with the conjugate for the target enzyme. By measuring the rate of product formation or substrate depletion catalyzed by the indicator enzyme, the inhibitory activity of the candidate compound can be determined. The methodology is particularly applicable for target enzymes that have substrates or products that are difficult to synthesize and/or detect, such as kinases and phosphatases.
    Type: Grant
    Filed: May 3, 2002
    Date of Patent: August 3, 2004
    Assignee: Discoverx, Inc.
    Inventors: Riaz Rouhani, Inna Vainshtein
  • Patent number: 6176962
    Abstract: Methods are provided for the fabrication of polymeric microchannel structures having enclosed microchannels of capillary dimension. The microchannel structures are constructed of a base plate and a cover, sealed together. Microchannel structures having walls of a plastic material are formed in a generally planar surface of at least the base plate. The cover has at least one generally planar surface, and the microchannel structures are enclosed by bonding the planar surfaces of the cover and the base plate together. In some embodiments the surfaces of the cover and base plate are both of plastic material, and are directly thermally bonded. In some embodiments a bonding material is applied to one of the surface prior to bringing the surfaces together. Suitable bonding materials are disclosed.
    Type: Grant
    Filed: June 18, 1997
    Date of Patent: January 23, 2001
    Assignee: Aclara Biosciences, Inc.
    Inventors: David S. Soane, Zoya M. Soane, Herbert H. Hooper, M. Goretty Alonso Amigo
  • Patent number: 5364531
    Abstract: Immunoaffinity purifications are performed using non-aqueous media, desirably, a small amount of an aqueous buffered medium, and, optionally, a surfactant. Hydrophobic ligands can be extracted from samples, immunoaffinity purified and eluted to provide a substantially pure product.
    Type: Grant
    Filed: November 10, 1992
    Date of Patent: November 15, 1994
    Assignee: Hawaii Biotechnology Group, Inc.
    Inventors: Gary S. Bignami, Paul G. Grothaus
  • Patent number: 4769061
    Abstract: Enhanced resistance to glyphosate, an inhibitor of the aromatic amino acid biosynthesis pathway, is imparted to a glyphosate sensitive host. A mutated aroA gene is employed which expresses 5-enolpyruvyl-3- phosphoshikimate synthase (EC: (ES-3-P synthase). Methods are provided for obtaining the aroA mutation which provides the enzyme resistant to inhibition by glyphosate, means for introducing the structural gene into a sensitive host, as well as providing a method of producing the enzyme.The E. coli strain C600(pPMG1) has been deposited at the A.T.C.C. on Dec. 14, 1982 and given A.T.C.C. Accession No. 39256.
    Type: Grant
    Filed: February 4, 1985
    Date of Patent: September 6, 1988
    Assignee: Calgene Inc.
    Inventor: Luca Comai
  • Patent number: 4732852
    Abstract: Method for preparing peptides free of undesired amino acids or amino acid sequences employing site specific receptors and proteases to cleave unprotected enzymatically hydrolyzable bonds.
    Type: Grant
    Filed: August 20, 1984
    Date of Patent: March 22, 1988
    Assignee: Cetus Corporation
    Inventors: Stanley N. Cohen, Annie C. Y. Chang
  • Patent number: 4727022
    Abstract: Methods are provided for modulating Ligand-Receptor interactions by binding of molecules at two epitopes of a receptor, where the epitopes are in relatively close special relationship. By providing for inhibition of changes in conformation of the receptor, where the inhibition is due to steric interactions or molecular bridging between the two epitopic sites, Ligand-Receptor interactions may be modulated. The modulation of Ligand-Receptor interactions has application to diagnostic assays, modulation of cellular activity, and modulation of the physiological activity of macromolecular compounds.
    Type: Grant
    Filed: March 14, 1984
    Date of Patent: February 23, 1988
    Assignee: Syntex (U.S.A.) Inc.
    Inventors: Carl Skold, Dennis R. Gould, Edwin F. Ullman
  • Patent number: 4713348
    Abstract: Methods are provided for rapidly determining a number of parameters in a few determinations. Particularly, the method is applicable to blood typing, determining the blood type as to the ABO and Rh type, as well as the determination of isoantibodies to the antigens. The method employs fluorescent particles having a plurality of fluorescers, where the presence or absence of light emission of a particular wavelength can be determined.
    Type: Grant
    Filed: October 22, 1985
    Date of Patent: December 15, 1987
    Assignee: Syntex (U.S.A.) Inc.
    Inventor: Edwin F. Ullman