Microbiology

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    Protocols in Current Issue
    Enzymatic Activity Assay for Invertase in Synechocystis Cells
    Authors:  Xiaoming Tan, Kuo Song and Xuefeng Lu, date: 05/20/2018, view: 1874, Q&A: 0
    [Abstract] Invertase can catalyze the hydrolysis of sucrose, and is widely distributed in cells of cyanobacteria and plants. Being responsible for the first step for sucrose metabolism, invertase plays important physiological roles and its enzymatic activity is frequently needed to be determined. All the methods for determination of the invertase activity ...
    Determination of Intracellular Osmolytes in Cyanobacterial Cells
    Authors:  Xiaoming Tan, Kuo Song, Cuncun Qiao and Xuefeng Lu, date: 04/20/2018, view: 1671, Q&A: 0
    [Abstract] Most of the cyanobacteria accumulate osmolytes including sucrose, glucosylglycerol, in their cells in response to salt stress. Here we describe a protocol of our laboratory for extraction and quantification of cyanobacterial intracellular sucrose and glucosylglycerol. We have confirmed this protocol was applicable to at least four kinds of ...
    Assaying Glycogen and Trehalose in Yeast
    Authors:  Yuping Chen and Bruce Futcher, date: 07/05/2017, view: 4251, Q&A: 0
    [Abstract] Organisms store carbohydrates in several forms. In yeast, carbohydrates are stored in glycogen (a multi-branched polysaccharide) and in trehalose (a disaccharide). As in other organisms, the amount of stored carbohydrate varies dramatically with physiological state, and accordingly, an assay of stored carbohydrate can help reveal physiological ...
    Incubation of Cyanobacteria under Dark, Anaerobic Conditions and Quantification of the Excreted Organic Acids by HPLC
    Authors:  Chika Yasuda, Hiroko Iijima, Haruna Sukigara and Takashi Osanai, date: 05/05/2017, view: 3899, Q&A: 0
    [Abstract] Succinate and lactate are commodity chemicals used for producing bioplastics. Recently, it was found that such organic acids are excreted from cells of the unicellular cyanobacterium Synechocystis sp. PCC 6803 under dark, anaerobic conditions. To conduct the dark, anaerobic incubation, cells were concentrated within a vial that was then ...
    Determination of D-galactofuranose Content of Galactomannoproteins in Aspergillus nidulans
    [Abstract] Galactofuranose (Galf) is a component of several polysaccharides and glycoconjugates in certain species of filamentous fungi. Galf residues are frequently found in Aspergillus glycoproteins, including N-glycans and O-mannose glycans that modify many cell wall proteins and extracellular enzymes. It is ...
    Intracellular Glycogen Assays
    Authors:  Yong Jun Goh and Todd R. Klaenhammer, date: 06/05/2014, view: 8441, Q&A: 0
    [Abstract] Glycogen, a soluble multi-branched glucose homopolysaccharide, is composed of chains of α-1,4-linked glucose residues interconnected by α-1,6-linked branches. The classical biosynthetic pathway involves phosphoglucomutase (Pgm), glucose-1-phosphate adenylyltransferase (GlgC or GlgCD), glycogen synthase (GlgA) and branching enzyme (GlgB). ...



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