10.1371/journal.pone.0061634.g007 Figure 7 Untranslated 5′ regulatory region of ABCB genes from the mussels M. galloprovincialis and M. californianus showing promoter elements. Numbering is relative to the transcription initiation site. Gene Bank Accession Numbers are FM999809 (M. galloprovincialis ABCB1) and EF52141 (M. californianus ABCB). Sequence of the human ABCB1 promoter in the same region is reported for comparison (GenBank Ac. Numb. NM000927). Furthermore, a more complete sequence analysis of the human ABCB1 promoter is reported by Scotto and Johnson [6] and Rohlff and Glazer [28].