It is produced by the strain of Str. tanashiensis IM 8442T. It's a quinone antibiotic. It has the activity of anti-gram-positive bacteria and some gram-negative bacteria, but the effect of anti-gram-negative bacteria is weak and has no effect on fungi. Lactoquinomycin A has stronger antibacterial activity than Lactoquinomycin B. It inhibits a variety of cell lines including lymphoma L5178Y progenitor, adriamycin resistant, bleomycin-resistant, human leukemia K562, mouse leukemia L-1210 and mouse leukemia P 388 with ID50 (μg/mL) of 0.43, 0.21, 0.19, 0.16, 0.2 and 0.12, respectively.