Additional file 5. Native PAGE of human placental and recombinant CRTs from the same storage buffer. Human placental CRT was transferred to the same buffer used for storage of recombinant CRTs (20 mM Tris–HCl, 150 mM NaCl, 3 mM CaCl2, pH 7.5) and all three CRTs were analysed by electrophoresis under native conditions. Blue native PAGE is shown above and native PAGE below, all references are the same as in Fig. 2 legend.