Dl. Popham et P. Setlow, THE CORTICAL PEPTIDOGLYCAN FROM SPORES OF BACILLUS-MEGATERIUM AND BACILLUS-SUBTILIS IS NOT HIGHLY CROSS-LINKED, Journal of bacteriology, 175(9), 1993, pp. 2767-2769
Determination by amino acid analyses of the percentage of diaminopimel
ic acid in the spore cortex of Bacillus megaterium and Bacillus subtil
is which is involved in interpeptide cross-links gave values of 31 to
37%. This finding supports the idea that the cortex volume could under
go significant changes in response to changes in pH or ionic strength
and could thus play an active role in reducing the water content of th
e spore protoplast during sporulation.