Fig 4.

Housekeeping genes that do not have a measureable change in transcription under low- versus high-DIC conditions, as determined with microarrays. Shown here listed by subunits are genes involved in DNA, RNA, and protein synthesis, as well as ATP synthesis and electron transport (NADH dehydrogenase, bc₁ complex, cbb complex). Two or three probes were designed to target each gene, and results from all are averaged per gene. Error bars represent standard deviations as propagated from normalized spot intensities from three low-DIC and three high-DIC chemostats.