FIG 4.

Ion contents of purified phase-bright spores. Purified spores were extracted with HCl, and the amounts of various ions were quantified using atomic emission spectroscopy. Values are averages from three to nine assays, depending on the strain, and are expressed as percentages of the values found in PS832 (wild type) spores prepared on the same day. The strains examined were DPVB693 (ΔyloB), DPVB706 (Δ3), DPVB715 (ΔyugS::mls), DPVB716 (ΔchaA::spec), and DPVB722 (Δ5ΔyloB). Error bars indicate standard errors. *, significant difference from PS832 (P ≤ 0.05).