Fig. 1. Characterisation of the m-Rab_mc antiserum by two-dimensional gel-electrophoresis. (A) Western blot of Mesembryanthemum crystallinum protein extracts incubated with the m-Rab_mc antiserum. The arrow indicates the single polypeptide recognized by the m-Rab_mc antiserum, with a molecular mass of approximately 21 kDa and an isoelectric point near pH 7. (B) Silver-stained gel of the western blot in A. The arrow indicates the putative position of the m-Rab_mc-labelled polypeptide. (C) Western blots of protein extracts of M. crystallinum leaf extracts (a), BY-2 cells (b), A. thaliana suspension cells (c) and tobacco leaves (d). m-Rab_mc antiserum stains a single band of approximately 21 kDa.