SUMMARY The results are presented of a survey of NAD and NADP concentration in twenty microorganisms. They fell into three categories with respect to NAD concentration. (i) High NAD (> 4.5 ,umoles/g. dry weight) in obligate anaerobes, members of the Lactobacillaceae and Saccharomyces cerevisiae. (ii) Medium NAD (1.0-3.0 pmoleslg. dry weight) in faculative anaerobes, photosynthetic bacteria and ...
