A valved container assembly comprising a container for containing a fluid, the container extending in an axial direction and having at least one venting opening at a front end and at least one dispensing opening. The system may include a breathing support device configured to deliver gas to a patient and a display device associated with the breathing support device. The roller is positioned by controlling or regulating a magnetic bearing device in which the roller is mounted. The protein is highly unique in its sequence and may represent the first in a novel family of receptor proteins.