Chemistry: molecular biology and microbiology – Enzyme – proenzyme; compositions thereof; process for... – Enzyme inactivation by chemical treatment
Reexamination Certificate
2002-12-11
2008-05-27
Benzion, Gary (Department: 1637)
Chemistry: molecular biology and microbiology
Enzyme , proenzyme; compositions thereof; process for...
Enzyme inactivation by chemical treatment
C530S402000, C435S199000
Reexamination Certificate
active
07378262
ABSTRACT:
The invention relates to a composition comprising a first modified thermostable enzyme exhibiting 3′exonuclease activity but essentially no DNA polymerase activity and a second modified thermostable enzyme exhibiting DNA polymerase activity, whereas the fidelity of an amplification process is enhanced by the use of the composition in an amplification process in comparison to the use of the single second enzyme in an amplification process and, whereas said first and said second modified thermostable enzyme is reversibly modified by an inhibiting agent which results in essentially complete inactivation of enzyme activity, wherein incubation of said first and said second modified thermostable enzyme in an aqueous buffer at alkaline pH at a temperature less than 25° C. for 20 minutes results in no significant increase in the activity of said first and said second modified thermostable enzyme, wherein incubation at a temperature greater than 50° C. in an aqueous buffer at alkaline pH results in at least tow-fold increase in enzyme activity in less than 20 minutes which allow formation of primer extension products.
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Greif Michael
Sobek Harald
Benzion Gary
Mummert Stephanie K.
Nersesian Rhea C.
Roche Molecular Systems Inc.
Townsend and Townsend / and Crew LLP
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