A first planet stage of an epicyclic gearbox revolves in a gearbox housing and includes a planet support having two interconnected side pieces. Also provided herein are vectors and host cells comprising those nucleic acid sequences, chimeric polypeptide molecules comprising the polypeptides of the present invention fused to heterologous polypeptide sequences, antibodies which bind to the polypeptides of the present invention and to methods for producing the polypeptides of the present invention. The first and second communication session correspond to a common user account and are active concurrently. A spring retainer may slide into slots or grooves in the lock body to prevent the lock body from disengaging. The block copolymers may spontaneously form micelles, believed to have zwitterionic, for instance phosphorylcholine, groups at the external surface, which may be useful as drug delivery systems with improved biocompatibility. Embodiments can therefore provide improved resolution and can operate at lower gas pressures.