Tween® 80
Company: Sigma-Aldrich
Catalog#: P4780
Product evaluation:
Separation of Free and Bound cAMP in Mycobacteria
[Abstract]  Mycobacterial genomes encode a plethora of genes that are involved in the synthesis, utilization and degradation of cAMP. The genome of M. tuberculosis H37Rv, for example, encodes 16 adenylyl cyclases and 10 genes harbouring the cyclic nucleotide-binding (CNB) domain (Shenoy and Visweswariah, 2006). Cyclic AMP is efficiently secreted by mycobacteria, and cytosolic as well as extracellular levels of cAMP can reach hundreds of micromolar. We have recently reported that an abundantly ...

Analysis of Mycobacterial Protein Secretion
[Abstract]  Mycobacterium tuberculosis (Mtb) is the causative agent of tuberculosis. Analysis of proteins secreted by Mtb has been of interest to the field of tuberculosis research since certain secreted proteins interact with the host to promote virulence, while others may be important antigens or serve as biomarkers of infection. Here, we describe a protocol to prepare whole cell extracts (WCE) and short term culture filtrate (CF) from Mtb or the vaccine strain Mycobacterium bovis- ...

DNA Damage Sensitivity Assays with Arabidopsis Seedlings
[Abstract]  We describe fast and reproducible sensitivity assays to quantify the response of Arabidopsis seedlings of different genotypes to a wide range of DNA damaging agents. We apply (1) γ-irradiation, which produces DNA breaks, (2) bleocin, a radiomimetic drug, (3) mitomycin C, a DNA intrastrand cross-linker, (4) hydroxyurea, an inhibitor of DNA synthesis and (5) UV-C, which causes mainly photoproducts. The “true leaf assay” and the “UV resistance assay” are based on easily determined ...

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