Predicted to enable CXCR4 chemokine receptor binding activity. Predicted to be involved in chemokine-mediated signaling pathway; maintenance of gastrointestinal epithelium; and negative regulation of gastric acid secretion. Predicted to act upstream of or within several processes, including calcium-mediated signaling; negative regulation of macrophage activation; and positive regulation of ERK1 and ERK2 cascade. Predicted to be located in extracellular region. Predicted to be active in extracellular space. Orthologous to human TFF2 (trefoil factor 2). [provided by Alliance of Genome Resources, Apr 2022]