DNA analysis system

Abstract

This DNA analysis system comprises: a flow channel device that has a PCR chamber that performs thermal cycles; and a capillary electrophoresis unit that electrophoretically analyzes a PCR reaction liquid. The DNA analysis system stores values of m and n set in advance, the PCR reaction liquid is subjected to m thermal cycles in the PCR chamber to produce a first reaction liquid, part of the first reaction liquid is taken out from the PCR chamber without changing the composition, the part of the first reaction liquid is electrophoretically analyzed in the capillary electrophoresis unit, the first reaction liquid remaining in the PCR chamber is subjected to n-m thermal cycles (provided that n-m is an integer of 2 or more) in the PCR chamber such that the total number of thermal cycles is n to produce a second reaction liquid, at least part of the second reaction liquid is taken out from the PCR chamber without changing the composition, and at least the part of the second reaction liquid is electrophoretically analyzed in the capillary electrophoresis unit.