LAP3 and gastric cancer: The differential function expression of the intestinal flora of GC patients were mainly rich in two_component_system, glycolysis/gluconeogenesis, secretion_system, peptidoglycan_biosynthesis, transporters, quorum_sensing, transcription_factors, purine_metabolism, ABC_transporters, peptidases, chaperones_and_folding_catalysts, chromosome_and_associated_proteins, carbon_fixation_pathways_in_prokaryotes, peptidoglycan_biosynthesis_and_degradation_proteins, and pyruvate_metabolism.