Harvesting and Lysis of Bacteria. Mini-prep plasmid purification using Solution I, Solution II and Solution III. The Preuss Lab. Univ. Chicago. - [Read Alkaline Lysis Mini-Prep Protocol]
Protocol for C. elegans RNAi. Includes: Transformation of competent cells; Blunt-end ligation; Preparation of competent cells; Dephosphorylation of linear plasmid DNA; Restriction Digest: EcoRV; Insert amplification from gDNA; Gel purification: QiaQuick gel purification kit; Mini-prep; Transformant Screening; Bacterial preparation and induction; Preparation of worms for RNAi feeding. - [Read C. elegans RNAi Protocol]
The key step is the lysis which solubilizes centrosomes away from nuclei by very low ionic strength lysis after treatment of cells with nocodazole and cytochalasin B. The released centrosomes are then centrifuged onto a Ficoll cushion (to avoid pelleting) and the interface between the lysate and the Ficoll is collected and the centrosomes are concentrated on a sucrose gradient. Fractions are assayed by spindown and double IF with 5051 serum and anti-tubulin and the pooled fractions are frozen... - [Read CHO Centrosome Prep Protocol]
Protocol for CsCl prep of plasmid DNA. This is a standard large scale prep. For plasmid DNA which gives a yield of 0.5 1.0 mg. - [Read CsCl Prep of Plasmid DNA Protocol]
Protocol for fungal DNA isolation. The key elements in this prep are (1) the use of young lyophilized mycelial mats....young mats (4 days growth for C. carbonum)...yield less contaminating carbohydrates and other misc. junk (2) lots of proteinase K in the extraction buffer to kill Dnases (final =0.3mg/ml). - [Read Fungal DNA Isolation Protocol]
Protocol that isolates intact, high molecular weight DNA from yeast cells for subcloning and rare cutting restriction enzyme analysis. Using this protocol one can expect a yield of 100-200 µg of DNA per prep. - [Read High Molecular Weight Yeast Liquid DNA Preparation Protocol]
A Single Stranded Plasmid DNA Isolation Protocol describing the production and isolation of single-stranded DNA (ssDNA) using bacteriophagemid-containing bacteria and helper phage. Infection of the host cells with helper phage allows for packaging of ssDNA into bacteriophage. The ssDNA can then be isolated from phage particles.
DNA microarrays are an ordered arrangement of DNA molecules complementary to genes of interest that are "spotted" by robotic equipment onto a glass slide substrate. The expression of genes in cells can be monitored with microarrays by preparing cDNA from the mRNA of cells of interest and measuring the hybridization to the microarray. This protocol describes the labeling of genomic DNA for use as a probe for hybridization to the cDNA spotted on the array.
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 Microarray Protocol Preparation of Fluorescent DNA Probes from Human mRNA protocol describes the production of probes labeled with the fluorescent dyes, Cy3 and Cy5, following the synthesis of cDNA from human mRNA and the hybridization of the probes to DNA microarrays.