Stage III sporulation protein AC/AD protein family
This family consists of several bacterial stage III sporulation protein AC (SpoIIIAC) and SpoIIIAD sequences. The exact function of this family is unknown. SpoIIIAD is the an uncharacterized protein which is part of the spoIIIA operon that acts at sporulation stage III as part of a cascade of events leading to endospore formation. The operon is regulated by sigmaG.