Enables identical protein binding activity; lactose binding activity; and laminin binding activity. Involved in several processes, including cellular response to glucose stimulus; positive regulation of erythrocyte aggregation; and response to isolation stress. Located in cell surface; cytosol; and nucleus. Biomarker of B-cell lymphoma; extrahepatic cholestasis; and lipoid nephrosis. Orthologous to human LGALS1 (galectin 1). [provided by Alliance of Genome Resources, Apr 2022]