[Production of tubular structures from the aerial mycelium of Actinomyces roseoflavus var. roseofungini].

Tubular formations analogous by their structure to those found on the surface of the outer sheath of the hyphae of the aerial mycelium of Actinomyces roseoflavus var. roseofungini were reconstructed in vitro from the mycelium acetone extract on addition of water. A polyenic antibiotic was shown to be present in the composition of the "tubes". A possible role of the antibiotic in the genesis of the secondary structures of the actinomycete is discussed.