AGENT FOR DEMONSTRATION OF PROTEOLYTICAL FERMENTS

• Main Authors: KUHR,MANFRED,DE, WERNER,WOLFGANG,DE, BERGER,DIETER,DE, BRAUN,FRANZ,DE, GUETHLEIN,WERNER,DE
• Format: Patent
• Language: English
• Published: 16.10.1986
• Edition: 4
• Subjects: BEER; BIOCHEMISTRY; CHEMISTRY; COMPOSITIONS OR TEST PAPERS THEREFOR; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL ORENZYMOLOGICAL PROCESSES; ENZYMOLOGY; HETEROCYCLIC COMPOUNDS; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEICACIDS OR MICROORGANISMS; METALLURGY; MICROBIOLOGY; MUTATION OR GENETIC ENGINEERING; ORGANIC CHEMISTRY; PEPTIDES; PHYSICS; PROCESSES OF PREPARING SUCH COMPOSITIONS; SPIRITS; TESTING; VINEGAR; WINE

The present invention provides a diagnostic agent for the detection of proteolytic enzymes, comprising an absorbent carrier, a film layer, a powder mixture, a lyophilisate, a solution or a reagent tablet, containing at least one chromogen and an appropriate buffer substance, wherein the chromogen used is an indoxyl- and/or thioindoxyl-amino acid ester and/or peptide ester of the general formula: wherein R1, R2, R3 and R4, which can be the same or different, are hydrogen or halogen atoms, lower alkyl, lower alkoxy, aryl, aralkyl, aralkoxy, hydroxyl, carboxy, carboxy lower alkoxy, aralkoxycarbonyl, aralkyloxycarbonyl lower alkoxy, nitro or lower acylamino radicals, whereby two adjacent substituents can also represent an optionally halogenated fused benzene ring, X is a sulphur atom or an imino group optionally substituted by a lower alkyl, aryl, aralkyl or acyl radical, A is an amino acid or peptide residue and B is a nitrogen protective group conventional in peptide chemistry or derived therefrom. The present invention also provides new compounds of the above-given general formula and processes for the preparation thereof. Furthermore, the present invention is concerned with the use of the compounds of the above-given general formula for the production of diagnostic agents for the detection of proteolytic enzymes.