A deletion in the second cytoplasmic loop of GluR3 produces a dominant negative mutant of AMPAR

A chart box for accommodating a recording strip chart either in a roll or a folded zig-zag form. The chart box includes two compartments for holding either type of recording chart with a chart driving roller arranged between. A first compartment includes a flap for closing an access to the compartment while guiding the strip chart. The first compartment includes recesses for restraining an axle of a rolled strip chart. The second compartment stores the strip chart by gravity and includes a resiliently mounted pressure roller for guiding the strip chart to the drive roller.