Calcineurin B subunit beta polypeptides and polynucleotides and methods for producing such polypeptides by recombinant techniques are disclosed. The printing devices and print-related devices are connected to the common print line bus by means of associated print line bus adapters to constitute a printshop environment. The device provides improved measurement accuracy, provides enhanced reliability and longer life of the sensors, and allows lower cost of manufacture and maintenance. The fan unit provides multiple fans coupled to internal exhaust ducts that are arranged to draw and to remove exhaust air vented from rack-mounted equipment. The vacuum connection may be separated from the liquid collector by a liquid barrier. More particularly, the present invention relates to the use of the synthetic receptors for delivering a protein, peptide, drug, prodrug, lipid, nucleic acid, carbohydrate or small molecule into a target cell via receptor-mediated endocytosis.