X-14885A, a novel divalent cation ionophore produced by a Streptomyces culture: discovery, fermentation, biological as well as ionophore properties and taxonomy of the producing culture.

Abstract

Antibiotic X-14885A is a novel divalent cation ionophore produced by a Streptomyces culture isolated from soil sample collected in Wyoming. Its cation binding sequence has been found to be: Mg2+ greater than Ca2+, Sr2+ greater than Ba2+ much greater than Li+, Na+, Rb+, K+, Cs+.