Medermycin

Lactoquinomycin A is a quinone antibiotic displaying activity against Gram-positive bacteria and some Gram-negative bacteria, though its efficacy is weaker against the latter and it is ineffective against fungi. It inhibits various cell lines, including lymphoma L5178Y progenitor cells, doxorubicin-resistant cells, bleomycin-resistant cells, human leukemia K562 cells, murine leukemia L-1210 cells, and murine leukemia P388 cells, with ID50 values (μg/mL) of 0.02, 0.006, 0.008, 0.033, 0.013, and 0.03, respectively.