Yeast cells were transformed with three plasmids expressing: i) Y/CFP-C-Ypt1, Ypt1 was tagged at its N terminus with the C terminal fragment of Y/CFP; ii) YFP-N-Atg11, Atg11 tagged at its N terminus with the N terminal fragment of YFP; and iii) Trs85-CFP-N, Trs85 tagged at its C terminus with the N terminal fragment of CFP. Every cell shows multiple puncta in the CFP channel representing the Ypt1-Trs85 interaction. One of these puncta (arrows) co-localizes with the single punctum in the YFP channel representing the Ypt1-Atg11 interaction (merge). Size bar, 5 μm. See details in Lipatova et al, 2012 (4).