In practice, to research the molecular mechanism of LINC00673 in breast cancer, Kun Qiao et al. used Lncbook to explore potential miRNAs that may be targeted by LINC00673 and MARK4.258 miRNAs were identified and of which 40 miRNAs that had been claimed to be associated with cancers were selected for further study. The gene discussed is MARK4; the disease is breast carcinoma.