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(a) Three to five μl of sample was drawn into the kidney dialysis straw by capillary action. (b) Ends of the straw were sealed using an assembly made from interlocking truncated micropipette tips. (c) The assembly was transferred into the dialysate. (d) The dialyzed sample was extruded onto parafilm and added to methylcellulose/uranyl acetate mix before loading and drying on an EM support grid.
