Fig. 2.

Ectoine synthesis gene organization in H. elongata and other prokaryotes. Shown are the ect genes from the subdivisions of the proteobacteria, the phyla Actinobacteria, Firmicutes, Planctomycetes and Thaumarchaeota. Only ectoine synthesis genes from prokaryotes with known genome sequences are depicted. l-2,4-diaminobutyric acid Nγ-acetyltransferase genes (ectA) are blue, diaminobutyric acid transaminase genes (ectB) are yellow, ectoine synthase (ectC) genes are green, ectoine hydroxylase genes (ectD, ectE) are red and aspartate kinase genes (ask) are pink. The accession numbers of all ect and ask genes are listed in Table S6.