The greA - and rnk -leaders. (a) The rnk-leader identified upstream of rnk in Pseudomonas. (b,c) The rnk-leader and greA-leader identified in Enterobacteria, upstream of rnk and greA, respectively. (d) The greA-leader identified upstream of greA in bacilli. (e) The rnk-leader identified upstream of rnk in Yersinia. Candidates are represented using the same conventions as in Figure 3.