Abstract: An electrophoresis device is used to separate a biological substance using a separation medium. A recovery hole configured to recover the separated target biological substance is formed in an electrophoresis device, the recovery hole is configured to be capable of accommodating a solvent that can suspend the target biological substance, a buffer tank configured to accommodate a buffer solution is provided below the recovery hole, and a membrane is disposed between the recovery hole and the buffer tank.

Abstract: Preprocessing samples for nucleic acid analysis requires a means for effectively and accurately size-fractionating and dividing a nucleic acid sample in order to remove foreign substances that will negatively impact analysis performance. The present invention provides an electrophoretic collection device characterized by comprising: a collection hole for collection of a nucleic acid sample that has undergone electrophoretic separation; a light source 6 that radiates excitation light onto the nucleic acid sample; a detector 7 that detects light that has been emitted from the sample due to the radiated light; and a dispensing mechanism 9, 10, 11 that collects a nucleic acid sample solution within the collection hole, wherein the light source, detector, and dispensing mechanism can access the collection hole from respectively different directions.

Abstract: In order to provide a molecular weight marker for electrophoresis that can be simultaneously electrophoresed in a same lane as a sample and can accurately predict an electrophoresis position of the sample, the molecular weight marker for electrophoresis of the present disclosure is characterized by containing a polyelectrolyte that is negatively charged in an aqueous solution and does not serve as a template for a DNA polymerase reaction.

Abstract: An electrophoresis method, system, and gel recover biological substances from the gel with high efficiency. The method uses an electrophoresis gel having an injection hole into which biological substances are injected and a recovery hole from which the biological substances are recovered. The electrophoresis method includes injecting the biological substances into the injection hole, and applying an electric field penetrating the injection and recovery holes. A vertical axis in a downward direction as a positive direction is set as an X-axis, an axis which is perpendicular to the X-axis is set as a Y-axis, and coordinates of a bottom of the recovery hole are set as (XC, YC). The X coordinate XC of the bottom of the recovery hole satisfies XC>X1 when the biological substance is electrophoresed to coordinates (X1, YC) in the recovery hole from a bottom of the injection hole in the applying the electric field.

Abstract: An electrophoresis method, system, and gel recover biological substances from the gel with high efficiency. The method uses an electrophoresis gel having an injection hole into which biological substances are injected and a recovery hole from which the biological substances are recovered. The electrophoresis method includes injecting the biological substances into the injection hole, and applying an electric field penetrating the injection and recovery holes. A vertical axis in a downward direction as a positive direction is set as an X-axis, an axis which is perpendicular to the X-axis is set as a Y-axis, and coordinates of a bottom of the recovery hole are set as (XC, YC). The X coordinate XC of the bottom of the recovery hole satisfies XC>X1 when the biological substance is electrophoresed to coordinates (X1, YC) in the recovery hole from a bottom of the injection hole in the applying the electric field.