The method, protocol describes a technique of the transfer of RNA from agarose gels to neutral or positively charged nylon membranes, using upward capillary flow of neutral or alkaline buffers.  RNA becomes covalently fixed to positively charged nylon membranes during transfer in alkaline buffers.  However, treatment by UV irradiation or heating is required to fix RNA to neutral membranes.

Protocol: Transfer and Fixation of Denatured RNA to Membranes Protocol