X-14547A, a new ionophorous antibiotic produced by Streptomyces antibioticus NRRL 8167. Discovery, fermentation, biological properties and taxonomy of the producing culture.

Abstract
X-14547A is a novel antibiotic produced by a new strain of S. antibioticus (NRRL 8167). The antibiotic is active in vitro against gram-positive bacteria and is capable of complexing and transporting divalent and monovalent metal cations.