FIG. 7.

Organization of genes encoding PBS of Synechococcus OS-B′ and their relative transcript levels in cultures grown in LL, ML, and HL. (A) Organization of genes encoding polypeptides of the PBS core and rods. The direction of transcription is indicated by the direction of the arrow representing each of the genes, and the size of the arrow has been scaled to the length of the gene. The names of the gene products are indicated underneath the respective gene representations, and those genes whose steady-state RNA levels were analyzed are outlined with a thick black line. Contiguous genes are shown connected. (B) Quantification of steady-state levels of apc and cpc transcripts. Transcript levels were normalized to the levels present in LL-grown cells. Growth light irradiances are indicated, and error bars are given as described in the legend to Fig. 1.