FIG. 1.
The ars gene cluster of Halobacterium sp. strain NRC-1. A 14-kb region of pNRC100 (bp 132000 to144000) (8) from wild-type Halobacterium sp. strain NRC-1 is shown containing the genes putatively responsible for arsenic resistance in this organism. Genes and open reading frames are shown as arrows to scale, with rightward or leftward transcriptional direction indicated. The positions of two IS elements flanking the gene cluster are indicated by boxes.