Particular examples of such a kit include membranes that are polycarbonate membranes, especially polycarbonate membranes coated with a material for increasing the affinity of the membrane to biomolecules, for instance nitrocellulose, poly-L-lysine, or mixtures thereof. [0139] III. Transfer Modes [0140] Provided herein are multiple methods for transferring biomolecules from a sample that is general