Enzyme-linked reagents give excellent sensitivity and use a simple light microscope for detection. A range of enzymes is available, but for staining in situ, horseradish peroxidase will suit most needs. Diaminobenzidine (DAB) is one of the most sensitive substrates for horseradish peroxidase. It yields an intense brown product that is insoluble in both water and alcohol. It can be made more sensitive by adding metal salts such as cobalt or nickel to the substrate solution. - [Read Antibody Addition to Drosophila Specimens and Detection Using Enzyme-Linked Reagents Protocol]
Protocol used to for immunohistochemistry on paraffin-embedded sections. Based on use of microwave energy to effect antigen retrieval. The immunohistochemistry procedure, is for use of Biomeda's HistoScan kit based on a streptavidin-peroxidase/biotinylated second antibody detection system with 3-amino, 9-ethylcarbazole (AEC) as chromogen. Undoubtedly, other kits or home-made reagents will also work . - [Read Antigen Retrieval for Immunohistochemistry with Paraffin-Embedded Tissues Protocol]
The procedure is to mutagenize a large population of worms with trimethylpsoralen and UV irradiation, set up 1152 subpopulations, screen DNA made from this library for deletions in specific genes by nested PCR, and then to recover single worms carrying the deletions through a sib-selection process. - [Read C. elegans Gene Knockout Protocol]
DNA Electroelution- http://rothlab.ucdavis.edu/protocols/dna-electroelution.html
DNA Electroelution. This protocol describes the purification of DNA by trapping in a high-salt cushion in a "UEA AnalyticalElectroeluter" (IBI). This machine is no longer manufactured, to our knowledge. However, a smiliar device can be easily made from Plexiglas according to the following diagram, taken from Cornel Mulhardt, Molecular Biology and Genomics (2007) Academic Press, p.52: Schimenti Lab - [Read DNA Electroelution]
PCR polymerase costs can be high. If you are willing to work, you can produce bacteria containing the clone. It appears to produce lots of Taq and is quite stable. The proceedure takes 4 days start to (15 000 units of Taq) finish. The Taq also appears ver - [Read Home-made Taq Polymerase Purification]
5 ml liquid lysates are prepared when a small amount of DNA from a large number of lambda clones is needed. The lysates can be made using 10- 20 ul of a stock lysate or a 100-fold amplified phage "macroplaque" as the inoculum. - [Read Liquid Phage Lysates Protocol]
This protocol describes an in vitro reaction to assay mitotic spindle assembly. The assay uses Cytostatic Factor extract made from Xenopus eggs, fluorescently-labelled tubulin, and prepared sperm nuclei. Spindle assembly is monitored by immunofluorescence microscopy. - [Read Protocol Spindle Assembly In Vitro]
In the past two decades, there have been many revolutions in light microscopy techniques made possible by improvements in optics, detector technology, and computers. Furthermore, there is no indication that the rate of development of new equipment is slowing down. Here we attempt to provide an overview of available options and important considerations applicable to imaging Drosophila cells and tissues. - [Read Selection of Appropriate Imaging Equipment and Methodology for Live Cell Imaging in Drosophila]
Protocol describes how to prepare double-stranded RNA (dsRNA) for RNA interference in Drosophila by synthesis of individual RNA strands from linearized plasmid templates, followed by annealing of the strands. DsRNA molecules with a length of 500-800 bp seem to be most active. The dsRNA can be made from cDNA or genomic DNA templates, as long as most of the dsRNA corresponds to presumptive exon sequence. - [Read Synthesis of dsRNA for RNAi in Drosophila: Plasmid Template Method Protocol]
Protocol for Xenopus sperm nuclei preparation. Sperm Nuclei can be made and stored as a stock for later use with Cytostatic Factor Extracts. - [Read Xenopus Sperm Nuclei Preparation Protocol]
Tubulin is polymerized into microtubules by incubating tubulin at 37°C with GTP. A nucleation seed is added when the purpose is to assay microtubule elongation. Tubulin can also be polymerized for the purposes of recycling the tubulin or labeling the microtubules with fluorescently labeled tubulin. Based on the protocol by Timothy Mitchison of Harvard University.
This protocol a protocol on how to generate transfected embryonic stem (ES) cell clones. The previous protocol in this series is the Protocol for Electroporation of ES cells. The next protocol in the series is the Protocol on Disaggregation, Expansion, and Freezing of Transfected ES Clones.
The protocol gives general considerations for the design of targeting vectors for transgenic mice. The protocol shares tips in the design of knock-out and knock-in vectors and some of their strategies for producing homologously recombined embryonic stem cells.