A device, system and method for producing glycosylated proteins in plant culture, particularly proteins having a high mannose glycosylation, while targeting such proteins with an ER signal andor by-passing the Golgi. Preferably each cordlike elastic member is connected to the frame and the rebounding mat at one of two alternative positions to alter the tension. The final player hand is evaluated by comparing the final player hand to a standard, such as a pay table, a final dealer hand, andor final player hands of other players.