Fig. 3From: Variation in tissue Na+ content and the activity of SOS1 genes among two species and two related genera of ChrysanthemumMultiple amino acid sequence alignment between four SOS1s. The 12 putative transmembrane domains are underlined and numbered 1 through 12. Residues conserved in at least two proteins are highlighted in white and blue. The black asterisks indicate conserved residues which were replaced in the site-directed mutagenesis experiment (see Additional file 2: Figure S4). Nhap, an Na+/H+ exchanger domain spanning the transmembrane region; InhiBD, an auto-inhibitory domain; S2P, SOS2 phosphorylation motifBack to article page