"Bioluminescence and Photonics of Fluorescent Proteins" session at the 9th Congress of the Russian Photobiology Society (Shepsi, Krasnodar region, Russia; September 12-19, 2021).

Here is a brief summary of presentations made by the participants of the "Bioluminescence and Photonics of Fluorescent Proteins" session at the 9th Congress of the Russian Photobiological Society which were dedicated to basic studies on bioluminescence systems of different organisms as well as to various analytical applications of bioluminescent proteins. Many questions to the speakers and in-depth and comprehensive discussion of the results obtained demonstrated the researchers' interest in this field of Photobiology. © International Union for Pure and Applied Biophysics (IUPAB) and Springer-Verlag GmbH Germany, part of Springer Nature 2022.