Endospores are produced by sporulation. Endospores are differentiated cells highly ressistant to heat, chemicals & radiation. They are strongly refractile, impermeable to most dyes. Outermost layer is the exosporium, a thin protein covering. Within this are spore coats composed of spore-specific proteins. Then the cortex, composed of loosly corss-linked peptidoglycan. Then the core or spore [...]