FIG. 3.

Northern hybridization analysis of S. aureus Oxford trxA and trxB transcripts in aerobic and anaerobic cultures. Total RNA was obtained from aerobic (A) and anaerobic (B) cultures at the early and mid-exponential phases and stationary phase, electrophoresed, blotted, and hybridized to trxA and trxB probes (see Materials and Methods). Sizes of transcripts are in kilobases; arrows indicate the positions of transcripts. (C) Growth profiles of S. aureus Oxford in aerobic and anaerobic conditions. The OD₆₀₀ was used to follow the growth of cultures in TSB medium at 37°C. The arrows in panel C indicate the samples in panels A and B.