To further understand the function of CAP1 in lung cancer cells, we extracted mRNA from A549 and sh-A549 cells for microarray analysis, and the analysis was performed by Shanghai OE Biotech Co., Ltd. The GO analysis revealed that CAP1 knockdown in A549 cells caused changes to the cell adhesion process, which impaired protein binding in molecular function. The gene discussed is CAP1; the disease is lung carcinoma.