Figure 1. Recombinant PfRab5B is N-myristoylated by PfNMT in vitro.

PfRab5B and the G2A and G2AC3A variants were incubated with [³H]-myristoyl CoA in the presence of N-myristoyl transferase. Recombinant ARF and ARFG2A were treated in the same way, acting as controls. N-myristoylation was detected by the incorporation of radiolabel into the substrate following SDS-PAGE and fluorography and the upper band at 50 kDa is due to label binding to PfNMT. Both PfRab5B and ARF migrated with mobility slightly faster than the 25 kDa molecular mass marker. No incorporation was detected if the N-terminal glycine residue of either protein was replaced with alanine (G2A).