DNA AMPLIFICATION METHOD USING DEAD-box RNA HELICASE DERIVED FROM THERMOPHILIC ARCHAEA OR VARIANT THEREOF, AND DEAD-box RNA HELICASE DERIVED FROM THERMOPHILIC ARCHAEA AND VARIANT THEREOF TO BE USED FOR DNA AMPLIFICATION METHOD

The present invention addresses the problem of providing a means for inhibiting non-specific amplification in a PCR. As a means for solving this problem, provided is a DNA amplification method through a polymerase chain reaction, characterized in that the polymerase chain reaction is performed in the presence of DEAD-box RNA helicase derived from a thermophilic archaea or a variant thereof that has thermophilic properties and helicase activity.