To obtain more insight into the differential effects of silencing SF3A3 and SNRPD3 on NSCLC cells versus fibroblasts, further cell cycle analyses were performed using EdU incorporation to detect active DNA synthesis in S‐phase cells; and immunostaining of histone H3 phosphorylation to dissect G2 and M phases of the cell cycle. This evidence concerns the gene SF3A3 and non-small cell lung carcinoma.