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Clostridioides difficile, an obligate anaerobic bacterium, causes infections leading to prolonged diarrhea. The bacterium produces dormant spores that can withstand an aerobic environment, resulting in easy environmental transfer. Here, we present a convenient sporulation and purification protocol that can be practiced in any lab setting using a portable anaerobic glove bag. This protocol also optimizes existing cell growth methods and presents a detailed trouble shooting guide. This protocol is a modification of those previously reported by Edwards and McBride (2016) and Shen et al. (2016).Pulmonary neuroendocrine cells (PNECs) are sensory cells within the lung airway epithelia. Here, we provide a detailed protocol for generating induced PNECs (iPNECs) from human induced pluripotent stem cells (iPSCs). The cellular and molecular profile of iPNECs resembles primary human PNECs. Primary human PNECs are exceedingly rare, comprising only 1% of the adult lung. Therefore, a self-renewing source of patient-specific iPNECs facilitates the creation of reproducible human cellular models to study lung diseases characterized by PNEC dysfunction. For complete details on the use and execution of this protocol, please refer to Hor et al. (2020).Stimulation of naive T lymphocytes via the T cell receptor (TCR) induces distinct phosphorylation patterns that can be used to explore various signaling pathways within the cell. This protocol can be used to characterize different perturbations to the signaling pathways and the variations in time of stimulation. Here, we provide a method of barcoding and consolidating a maximum of 24 different sample conditions using two florescent dyes. This single sample for phospho-staining and flow cytometry saves time and reagents. For complete details on the use and execution of this protocol, please refer to Krutzik and Nolan (2006), Krutzik et al. (2012), Vercoulen et al. (2017), Ksionda et al. (2018), and Myers et al. (2019).Chromatin immunoprecipitation with sequencing (ChIP-seq) has been instrumental in understanding transcription factor (TF) binding during gene regulation. ChIP-seq requires specific antibodies against desired TFs, which are not available for numerous species. Here, we describe a tissue-specific biotin ChIP-seq protocol for zebrafish and chicken embryos which utilizes AVI tagging of TFs, permitting their biotinylation by a co-expressed nuclear biotin ligase. Subsequently, biotinylated factors can be precipitated with streptavidin beads, enabling the user to construct TF genome-wide binding landscapes like conventional ChIP-seq methods. https://www.selleckchem.com/products/filgotinib.html For complete details on the use and execution of this protocol, please see Lukoseviciute et al. (2018) and Ling and Sauka-Spengler (2019).Here, we describe a xeno-free, feeder-free, and chemically defined protocol for the generation of ventral midbrain dopaminergic (vmDA) progenitors from human pluripotent stem cells (hPSCs). This simple-to-follow protocol results in high yields of cryopreservable dopamine neurons across multiple hPSC lines. Wnt signaling is the critical component of the differentiation and can be finely adjusted in a line-dependent manner to enhance production of dopamine neurons for the purposes of transplantation, studying development and homeostasis, disease modeling, drug discovery, and drug development. For complete details on the use and execution of this protocol, please refer to Gantner et al. (2020) and Niclis et al. (2017a).Previously developed senescent primary fibroblast models have limited relevance to study age-related changes in metabolically active tissues such as the liver. Here, we describe a protocol to generate senescent cells from the mouse hepatic cell line, AML12. These senescent cells exhibit molecular and metabolic signatures that are similar to those observed in livers from aged mice. These senescent AML12 cells should be a useful in vitro model to study the metabolic effects of aging in the liver. For complete details on the use and execution of this protocol, please refer to Singh et al. (2020).We describe how to predict population-level allele frequency change at loci associated with locally adapted traits under future climate conditions. Our method can identify populations that are at higher risk of local extinction and those that might be prime targets for conservation intervention. We draw on previously developed community ecology statistical methods and apply them in novel ways to plant genomes. While a powerful diagnostic tool, our method requires a wealth of genomic data for use. For complete details on the use and execution of this protocol, please refer to Blumstein et al. (2020).Anti-virulence therapies are under active investigation as antibiotic alternatives; however, their identification from large-scale chemical libraries poses a unique challenge. The dispensability of virulence factors for growth in vitro precludes conventional, optical density-based screening methods. Here, we provide a protocol for high-throughput screening with a cell-based, promoter reporter platform. We describe the use of this method for the identification of anti-SPI-2 inhibitors specific to Salmonella Typhimurium, which may be modified to investigate other virulence factors. For complete details on the use and execution of this protocol, please refer to Tsai et al. (2020).As mass cytometry (MC) is implemented in clinical settings, the need for robust, validated protocols that reduce batch effects between samples becomes increasingly important. Here, we present a streamlined MC workflow for high-throughput staining that generates reproducible data for up to 80 samples in a single experiment by combining reference sample spike-in and palladium-based mass-tag cell barcoding. Although labor intensive, this workflow decreases experimental variables and thus reduces technical error and mitigates batch effects.Here, we describe a protocol for producing multiple recessive mutants via genome editing in hexaploid wheat (Triticum aestivum) cv. Fielder. Using Agrobacterium-delivered CRISPR/Cas9 and three sub-genome-specific primer sets, all possible combinations of single, double, and triple transgene-free mutants can be generated. The technique for acceleration of generation advancement with embryo culture reduces time for mutant production. The mutants produced by this protocol can be used for the analysis of gene function and crop improvement. For complete details on the use and execution of this protocol, please refer to Abe et al. (2019).
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