“…Sporulating cells have been tested for several enzymes (Chatelain, 1975), fatty acids (Scandella & Kornberg, 1969), polyamines (Setlow, 1974), proteases (Chaloupka et al, 1982;Setlow, 1975), electron transport , calcium accumulation (Bronner & Freund, 1972;Hogarth & Ellar, 1978), dipicolinic acid (DPA) (Bach & Gilvarg, 1966), coat protein synthesis (Imagawa et al, 1985) and penicillin-binding proteins (Todd & Ellar, 1982). Several small acid-soluble proteins (SASPs) and their specific protease have also been isolated, cloned and characterized by Setlow and co-workers.…”