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. 2019 May 29;9:7991. doi: 10.1038/s41598-019-44481-z

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© The Author(s) 2019

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fluorescence imagining of a phage and a phage antireceptor (RBP) binding to S. thermophilus. Strain STCH_12, phage CHPC951, a fluorescence derivative of the RBP of phage CHPC951, and a purified mCherry protein were used in the experiments. (a) Imagining under a conventional fluorescence microscope: (1) adsorption of SYBR Gold DNA-labelled phages (green) to the host strain; (2) adsorption of mCherry-tagged RBP (red) to the bacterial cells; (3) no adsorption of mCherry proteins to the bacterial cells. (b) Super-resolution structured illumination microscopy (SIM) imagining: (1) bacterial cells were labelled with Nile Red (red) and mixed with SYBR Gold-DNA labelled phages (green); (2) bacterial cells were labelled with Van FL (green) and mixed with mCherry-tagged RBP (red); (3) bacterial cells were labelled with Van FL (green) and mixed with mCherry proteins (red). Scale bars: 1 µm.