A method of performing a reaction for the amplification of a nucleic acid

The invention relates to a method for performing a reaction for the amplification of a nucleic acid (nucleic acid amplification reaction; NSV) in a fluid conducting system (14), wherein said nucleic acid is contained in a first liquid (26), wherein a cylindrical reaction vessel (12) is provided, which at a first end an opening, the liquid-conducting manner via a first liquid line (16) to the flussigkeintsleitende system (14) is connected and which on the first liquid line (16) can be filled with the first liquid (26) and emptied, said reaction vessel (12) has a reaction vessel (12) displaceable first piston (18) between an exterior space and the interior of the reaction vessel (12).