passages.id: split_4_validation_801_passage
passages.type: progene_text
passages.text: Bypassing the phosphorelay by introducing the sof-1 mutation into this mutant did not restore spo0A ( P(S) ) expression , suggesting that disruption of shaA affects sigma(H) accumulation , but does not interfere with the phosphorylation and phosphotransfer reactions of the phosphorelay .