Transcriptional analysis of B. anthracis spo0E-like genes in B. anthracis (A) and B. subtilis (B). Cultures were grown in SM liquid medium. Symbols: •, BA0046; ▪, BAYisI; ▴, BA1877; ⧫, BA2416; ▾, pTCVlac vector. The growth curve of strains carrying the BA0046 construct is shown as representative of all growth curves (○).