The invention facilitates Sleeping in sitting position by supporting andor the body of a person in various positions. Guide pieces are provided that grip the ends of a connector and the cable to which the connector is attached. The method includes providing a fagopyritol synthase, providing a substrate comprising a galactosyl donor and a galactosyl acceptor, and combining the fagopyritol synthase with the substrate under conditions effective produce a fagopyritol, an insulin mediator, an insulin mediator analogue, an insulin mediator homologue, or an insulin mediator inhibitor.