Abstract
The level of cyclic GMP was less than one molecule per organism in dormant, germinated, and outgrowing spores of Bacillus megaterium. A significant level (approximately 8 pmol/g, dry weight) of cyclic GMP was found in early to mid-log phase cells, but the level fell to below 0.2 pmol/g, dry weight, in late-log phase and only rose slightly to approximately 0.9 pmol/g, dry weight, in stationary phare. No significant amount of cyclic GMP was detected in the growth medium at any time.
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