Confocal images of mammalian cells expressing mGeos-C (A, E, I, M), mGeos-M (B, F, J, N), mGeos-S (C, G, K, O) and mGeos-F (D, H, L, P) labeled proteins. (A)–(D) mGeos-β-actin (mouse) in HeLa cells; (E)–(H) α-actinin-mGeos (human) in HeLa cells; (I)–(L) mGeos-Mito (human, subunit VIII of human cytochrome C oxidase) in HEK293 cells; and (M)–(P) mGeos-histone H2B (human) in HeLa cells. Scale bars: 10 μm.