Fig. 1From: Flow cytometric quantification, sorting and sequencing of methanogenic archaea based on F420 autofluorescenceVisualization of the cofactor F420 autofluorescence in the methanogenic enrichment culture with a fluorescence microscopy, b fluorescence spectroscopy (405 nm excitation is marked with a purple line) and c flow cytometry. The gate F420+ is indicated. The arrow marks the added control beads (details in “Methods”)Back to article page