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Distribution of Ca-DPA levels in individual spores. Ca-DPA levels in 200 individual spores of different Bacillus species/strains were determined as described in Materials and Methods. The spores analyzed were from B. cereus T (a), B. megaterium QM B1551 (b), B. subtilis FB62 (gerD) (c), B. subtilis PS832 (wild type) grown with 2% xylose (d), B. subtilis PS3413 (Pxyl-spoVA) grown with 2% xylose (e), and B. subtilis PS3413 grown with 0.5% xylose (f).
