passages.id: split_8_test_1250_passage
passages.type: progene_text
passages.text: We propose that late in sporulation the rising level of GerE and the falling level of SpoIIID , together with the position and affinity of binding sites for these transcription factors in cot gene promoters , dictates the timing and level of spore coat protein synthesis , ensuring optimal assembly of the protein shell on the forespore surface .