To verify no homologous circVamp3 in mice, we designed the divergent and convergent primers to amplify the circVamp3, circIpo11(positive control, which was verified to exist in mice), and Vamp3 mRNA in Lewis lung carcinoma (LLC1) cell lines of C57BL mice and the lung of BLAB/c. The gene discussed is VAMP3; the disease is Carcinoma, Lewis Lung.