CEACAM6 and gastric cancer: In order to check the affinity of the fluorescent-labeled anti-CEACAM6 probe with GC cells, the CEACAM6-mAb-Alexa Fluo488 probe was synthesized, the AGS, MKN-45, and GES-1 cells were cultured in confocal specific dishes, and the cells were incubated with the fluorescent-labeled anti-CEACAM6 probe (CEACAM6- mAb-Alexa Fluo488).