Figure 1

Schematic representation of the definition of Promoters, 5'UTRs, 3'UTRs, and terminators. Two types of promoters appear in parts 1) and 2) Two types of terminators appear in parts 3) and 4). Note that that in cases 1) and 3) the terminator of one gene is the promoter of the next gene. Thus, in the case of terminators, we treated this category separately from the converging case [4].