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
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+>Ca2+, Sr2+>Ba2+>>>Li+, Na+, Rb+, K+, Cs+.