Knight:Gel filtration

in progress! very rough.

Overview
This procedure can be used either for concentration of protein samples or for buffer exchange.

Procedure
Just some notes.


 * 1) Pour column in a single step using a suspension of no more than 2 times the settled volume so that beads don't separate by size.
 * 2) Drain buffer to surface.
 * 3) Close clamp.
 * 4) Apply sample with pipette while moving the pipette around the column.
 * 5) Unclamp.
 * 6) Once sample has drained to surface, close clamp.
 * 7) Apply buffer with pipette.
 * 8) Unclamp.
 * 9) Once buffer has drained to surface, close clamp.