Electrophoresis gel cassette

An electrophoresis gel cassette, consisting of:

• a first plate;
• a second plate;
• a plurality of spacers;
• and
• three protrusions,
• wherein the first plate and the second plate respectively comprise a top side, a bottom side, a left side, a right side, a first surface and a second surface, and when the second plate is disposed substantially parallel to the first plate, the first surface of the first plate and the first surface of the second plate are parallel to each other, and the plurality of spacers is disposed on a left portion and a right portion of the first surface of the first plate or the second plate, in which a gel accommodating space is formed for accommodating an electrophoresis gel submerged in a buffer solution, and
• in order to prevent the electrophoresis gel from being expanded or deformed due to absorption of the buffer solution when the electrophoresis gel cassette is being stored, the three protrusions are collinear and equidistantly spaced, and integrally formed with the first plate or the second plate and disposed at a position on a bottom of the first surface of the first plate or the second plate for connecting the first plate and the second plate.