sentence: Morphologically , it begins with a conformational change of the nucleoid to form an elongated structure called the axial filament ( Hilbert and Piggot , 2004 ) , followed by an asymmetric cell division , which divides the sporulating cell into two unequally sized cell compartments : the small prespore or forespore , which develops into a mature , dormant endospore and the larger mother cell , which lyses after contributing its resources to the development of the spore ( Errington , 2010 ; Tan and Ramamurthi , 2014 ) .