Of B. anthracis lacking the BclB collagen-like protein have an exosporium that exhibits damage and loss of the exosporium at one pole (59). Furthermore, the distribution of exosporium proteins, such as CotY and BxpB, is altered in this mutant, suggesting that BclB is required for correct exosporium assembly. The normally cap-associated CotY protein is distributed more completely around the spore,