Enables phosphotyrosine residue binding activity. Predicted to be involved in several processes, including angiogenesis; apoptotic process; and signal transduction. Predicted to act upstream of or within several processes, including hematopoietic stem cell proliferation; negative regulation of oocyte maturation; and positive regulation of immune response. Located in cytoplasmic ribonucleoprotein granule; cytosol; and nucleoplasm. [provided by Alliance of Genome Resources, Apr 2022]