“…Alternatively, sporulating cells of B. subtilis, B. megaterium, and B. cereus exhibit two intervals of enhanced specific binding capacity during their postlogarithmic phase of growth (21). The reproducible fluctuations in a specific binding activity of sporulating cultures as contrasted with the constant binding activity of a nonsporulating organism during postlogarithmic growth agrees with other observations which conclude that functional PG biosynthesis is required during two distinct phases of sporulation (5,11,13,23,(31)(32)(33)(34).…”