Fig. 2.   Homology comparison of the amino acid sequences of the GSMT and SDMT enzymes of E. halochloris and A. halophila. Identical amino acids are shown in blue and similar amino acids are shown in red. The N termini of the native proteins isolated from the cell extracts are underlined. The putative AdoMet-binding site consensus sequence (tttxhhDhGtGxGhh) can be found in the amino acid sequences of all proteins (t, polar or turn forming; h, hydrophobic; x, any amino acid).