Arrangement of lrp and asp genes in halophilic organisms. In H. salinarum lrpA1 and aspB3 have separate promoters and the genes are orientated in opposite directions. lrp and asp in N. pharaonis, H. marismortui and H. walsbyi have one promoter and their open reading frames overlap.
Schwaiger et al. BMC Molecular Biology 2010 11:40 doi:10.1186/1471-2199-11-40