Detection of moesin in the culture supernatant of myeloid leukemia cell lines, CD34⁺ cells, CD3⁺ T cells, CD19⁺ B cells, and synovial cells. (A) Culture supernatants of various myeloid leukemia cell lines, CD34⁺ cells, CD3⁺ T cells, and CD19⁺ B cells were subjected to Western blotting using antimoesin Abs. (B) Exosomal fractions prepared from the culture supernatants of the 4 positive cell lines and synovial cells were also examined by Western blotting.