TABLE 2.

Levels of DPA in B. subtilis spore populations prepared with or without xylose^a

B. subtilis strain	% Xylose added to sporulation medium	DPA content (% dry wt)b
PS832 (wild type)	0	11.6
	0.5	9.5
	2	9.0
PS3413 (Pxyl-spoVA)	0.5	4.9
	2	8.1

^aSpores of various strains were prepared and purified, and DPA was extracted and analyzed colorimetrically as described in Materials and Methods.

^bThe standard deviations for the DPA contents were ±6%.