吡啶二羧酸 dipicolic acid

　　細菌芽孢中大量（幹重量為10-15％）cunzaidewuzhi。danyibanzaibuxingchengyabaodexijunhexingchengyabaodexijunqiyingyangxibaozhongdoubucunzai。cisuanzaiyabaozhongyigaiyandexingtaicunzaiyuneicengdexibaomohewaicengyabaoke（spore coat）間的皮層中。