epidermidis Rapamycin in vitro mRNA isolated during exponential phase when the following primer pairs were used: 1035 and 673; 672 and 760; and 940 and 1135 (primer pairs shown in Figure 3C). However, no amplicon was detected using primers 674/677 and 673/670. These data demonstrated sigA comprised the 3′ end gene of the S. epidermidis MMSO whereas serp1130 was located at the 5′ end. Figure 2 Growth analysis of S. epidermidis 1457. S. epidermidis was grown aerobically in tryptic soy broth over a 18 hour time period. Growth was assessed by measuring the optical density at 600 nm. Figure 3 Northern blot analysis of the S. epidermidis MMSO using a sigA and dnaG DNA probe.

The number above each lane in panels A (hybridized with a sigA probe) and B (hybridized with a dnaG probe) selleck chemical represents the time in hours of growth before each RNA sample was processed. A picture of the ethidium bromide stained gel is shown beneath each blot to serve as a loading control and verify RNA integrity. Arrows in panels A and B denote transcripts A, C through F as discussed in text. Panel C: Schematic depiction of the S. epidermidis MMSO. Small arrows above and below the schematic represent primer sets used in RT-PCR reactions and other cloning experiments. Arrows below the schematic correspond to

transcripts A, B, C, and D as discussed in text. To evaluate the transcriptional regulation of the 5′ genes in the MMSO during S. epidermidis growth, serp1129 and serp1130 were used as probes in northern blot analyses (Figures 4A-B). Both of these probes hybridized to mRNA in Decitabine a similar manner and identified four bands (A, B, E, and F).

Bands A, E, and F were 4.8 kb, 3.0 kb, and 2.5 kb in size, respectively, and corresponded to the same bands of similar size when both sigA and dnaG were used as probes (Figures 3A-B). A unique 1.5 kb band (band B; Figure 4A-B) was detected with both probes. Since the length of serp1129 and serp1130 combined is 1319 bp, these data suggested that both serp1129 and serp1130 were encoded on one mRNA transcript. The transcripts associated with bands A and B were detected only in aliquots taken during the exponential growth phase. Figure 4 Northern blot analysis of the S. epidermidis MMSO using a serp1129 and serp1130 DNA probe. The number above each lane in panels A (hybridized with a serp1129 DNA probe) and B (hybridized with a serp1130 DNA probe) represents the time in hours of growth before each RNA sample was processed. A picture of the ethidium bromide stained gel is shown beneath each blot to serve as a loading control and verify RNA integrity. Arrows in panels A and B denote transcripts A, B, E and F as discussed in text. Collectively, these data suggested the following: 1) the 4.