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Electrotransfer with LARGE
SEMIPHOR TRANSPHOR UNIT and
SEMIPHOR TRANSPHOR UNIT
Follow the instructions below to start an electrotransfer with the LARGE SEMIPHOR
TRANSPHOR UNIT and SEMIPHOR TRANSPHOR UNIT.
Action
Step
Make sure that the power supply is switched OFF.
1
Plug the color-coded leads from the base of the transfer unit into the power
supply jacks, matching red to red and black to black. Do not reverse polarity.
Red is positive (+) and black is negative (–).
2
Set the voltage limit to 30 V maximum. The input voltage must not exceed
30 V or the protection will be activated.
3
Make sure that the maximum current does not exceed 0.8 mA/cm
2
of the
gel surface or 500 mA maximum.
4
If available, set time for the transfer on the power supply.
5
Most transfers are complete within one hour, but larger proteins, proteins
from native gels, thicker gels and transferring several layers of gels, may
require an additional 1 hour of transfer time. The optimum transfer time for
each protein and gel system must be determined empirically.
Note:
Generally, smaller fragments transfer more quickly than larger ones.
Add sheets of buffer saturated blot paper in the transfer stack if the transfer
run time exceeds one hour.
6
46
SEMIPHOR TRANSPHOR UNIT series Operating Instructions 29281777 AA
5 Operation
5.2 Electrotransfer with LARGE SEMIPHOR TRANSPHOR UNIT and SEMIPHOR TRANSPHOR UNIT