%0 Journal Article %A TAPTYKOVA, Svetana D. %A KALAKOUTSKII, L. V. %T Low-Temperature Cytochrome Spectra of Anaerobic Actinomycetes %D 1973 %J International Journal of Systematic and Evolutionary Microbiology, %V 23 %N 4 %P 468-471 %@ 1466-5034 %R https://doi.org/10.1099/00207713-23-4-468 %I Microbiology Society, %X A sensitive, low-temperature spectrophotometric technique was used to detect the presence and relative contents of cytochromes resembling hemoproteins in suspensions of intact cells of 15 strains of anaerobic actinomycetes. The cytochrome content of most cultures was increased by aerated cultivation. Anaerobically grown cells of Actinomyces israelii serotype 2 contained virtually no cytochromes whereas those of A. israelii serotype 1, Actinomyces viscosus, and Actinomyces bovis, in this order, show an increased concentration of only cytochrome b (hemoprotein 559). Under aerobic conditions, A. viscosus was able to synthesize cytochromes c and a. No correlation was found between spectrophotometric and benzidine test data. Cytochrome spectra may be useful in differentiating serotype 1 from serotype 2 of A. israelii and differentiating A. bovis from the other species of Actinomyces studied. %U https://www.microbiologyresearch.org/content/journal/ijsem/10.1099/00207713-23-4-468