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. Author manuscript; available in PMC: 2017 Feb 21.
Published in final edited form as: Nanoscale. 2016 Feb 21;8(7):4134–4144. doi: 10.1039/c5nr07003a

Figure 2.

Figure 2

No contrast transmission electron micrograph of RAW 264.7 immortalized macrophages containing terbium-endohedral C60. (A) High contrast clusters of C60 (inside with circles) are observed in membrane-bound structures and scattered “free” throughout the cytoplasm. (B) Higher power no contrast TEM shows two major clusters of Tb@C60 adjacent to the cell membrane (upper left) and not bounded by lipid membrane in the cytosol. (C) High power examination of the nuclear envelope (dotted line) reveals membrane-associated clusters that are not contained in classical phagocytotic structures.