FIG. 2.

Schematic representations of the plasmids listed in Table 1 and used for product identification and complementation analysis. Wild-type sequence at the two starts is shown in normal type, and altered sequence is shown in bold type. The stem-loop structure surrounding the second start is indicated by gray arrows, which are absent if the structure has been disrupted or deleted. Ter, termination site. Black boxes indicate FLAG tags: N terminal in the case of pGS73 and C terminal in all other cases.