A device to be mounted to a friable wall comprises a body and at least one main saber tooth extending rearwardly from an upper portion of the body and adapted to be driven into the wall for securing the device thereto. The MMI region is tunable in response to detection of a photocurrent by a photodetector section. Downlink control information, transmitted using at least one antenna port of a base station on the EPDCCH using at least one of control channel elements, are received. The support cushion further includes an overlying layer placed in abutment with the second underlying layer, the overlying layer being made from a visco-elastic foam. The invention also relates to a kit for pre-labeling of proteins, comprising a labeling buffer, a dye, a molecular weight marker, and a sample gel loading buffer.