Patents Examined by Aleya Rahman
  • Glucosamine derivatives and compositions reagents and containing the same
    Patent number: 5126329
    Abstract: Novel phenylazonaphthol derivatives, e.g., 4-(4'-nitro-2'-sulfophenylazo)-1-naphthyl-N-acetyl-.beta.-D-glucosaminide sodium salt, are excellent substrates for determining N-acetyl-.beta.-D-glucosaminidase (NAG) activity in urine collected from the patient with renal disorders. The substrate has high water solubility, is not affected by interferences in urine and provides a simple method for determination of NAG activity which is suited for both rate and endpoint assays.
    Type: Grant
    Filed: December 27, 1989
    Date of Patent: June 30, 1992
    Assignee: Nitto Boseki Co., Ltd.
    Inventors: Kenji Tani, Yoshio Nakamura, Takeshi Nagasawa