Claim: There are twelve activators of sporulation in Bacillus subtilis and eleven repressors, including Sda.
Evidence: KinA KinB Spo0A Spo0H (σH) Spo0B Spo0F ComA SinI KipA PhrA PhrE PhrH Sda KipI Spo0A ComA SinR RapA, RapB, RapE, and RapH Spo0E, YisI, and YnzD GTP-bound CodY AbrB Hpr DnaA