Predicted to enable actin monomer binding activity. Predicted to be involved in regulation of cell migration and sequestering of actin monomers. Predicted to be active in cytoplasm. Is expressed in several structures, including heart; liver; lung; metanephros; and spleen. Orthologous to human TMSB15A (thymosin beta 15A) and TMSB15B (thymosin beta 15B). [provided by Alliance of Genome Resources, Apr 2022]