passages.id: split_5_test_3564_passage
passages.type: progene_text
passages.text: We show that the spo0H mutation spo0H81 , which blocks transcription from the wild - type spoVG promoter , enhances transcription from a mutant form of the spoVG promoter ( spoVG249 ) bearing a severe down - mutation ( a G.C to A.T transition ) at position - 13 in the " - 10 region. "