This family has members annotated as Spore coat protein Z, otherwise known as CotZ, It is a cysteine-rich spore coat family, and along with CotY is necessary for assembly of intact exosporium.

1: Assembly and genetics of spore protective structures. Takamatsu H, Watabe K; Cell Mol Life Sci. 2002;59:434-444. PMID:11964122

2: ExsY and CotY are required for the correct assembly of the exosporium and spore coat of Bacillus cereus. Johnson MJ, Todd SJ, Ball DA, Shepherd AM, Sylvestre P, Moir A; J Bacteriol. 2006;188:7905-7913. PMID:16980471