Abstract
Fluorescently labeled polysaccharides enable the visualization of carbohydrate-bacterial interactions and the quantification of carbohydrate hydrolysis rates in cultures and complex communities. Here, we present the method of generating polysaccharides conjugated to the fluorescent molecule, fluoresceinamine. Further, we describe the protocol of incubating these probes in bacterial cultures and complex environmental microbial communities, visualizing bacterial-probe interactions using fluorescence microscopy, and quantifying these interactions using flow cytometry. Finally, we present a novel approach forthe in situ metabolic phenotyping of bacterial cells using fluorescently activated cell sorting coupled with omics-based analysis.
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