FIG. 2.

Expression profiles of putative iron transporter genes in Synechocystis sp. strain PCC 6803. The amounts of transcripts in cells grown in normal BG-11 medium (lanes N) or in iron-free BG-11 medium (lanes -Fe) were determined by the RT-PCR method. The regions of the genes amplified are summarized in Table 1. OM, PP, and IM are as indicated in Fig. 1. Absence of contamination of DNA was confirmed by performing the RT reaction without reverse transcriptase (-RTase) followed by PCR.