On the isolation of dipicolinic acid from endospores of Sarcina ureae.

The isolation of an ultraviolet absorbing material from spores of Sarcina ureae and its identification as dipicolinic acid (DPA) is described. The DPA was present in amounts ranging from 4-7% of the spore dry weight, but was not detected in vegetative cells. The contention that the spores of Sarcina ureae are unusual or atypical, and that the organism is a morphologically aberrant Bacillus species is discussed and found wanting. [ABSTRACT FROM AUTHOR]