a mutation , spo-87 , in the spo0j locus of bacillus subtilis allows appreciable transcription of spoiia , spoiid and spoiig and later operons , even though most of the cells are morphologically blocked at stage 0 and the incidence of heat-resistant spores is about 1 per 10 ( 4 ) cells .
C1708726
locus
C0007634
cells