Figure 1. Features of exosomes isolated from breast cancer cells (BCCs) and MCF-7/TAMR-1(M/T) cells. (A) Representative images of exosomes isolated from BCCs and M/T cells, as photographed using the transmission electron microscope and the range of exosome diameter (right column). Scale bar = 500 nm (left column) and 200 nm (middle column). (B) The expressions of exosome markers in BCCs and M/T cells and their exosomes, as detected with western blots.