General guidelines for long-PCR conditions and enzyme mixtures. Efficient long-PCR results from the use of two polymerases: a non-proofreading polymerase is the main polymerase in the reaction, and a proofreading polymerase (3' to 5' exo) is present at a lower concentration. Includes: For PCR with low-complexity templates (e.g., plasmid and cosmid inserts); For PCR with moderate-complexity templates (e.g., bacterial genomic DNA); For PCR with high-complexity templates (e.g., human genomic DNA). - [Read Long-PCR Reagents and Guidelines]
Plasmid (pUC series) containing genomic DNA fragments are maintained in E. coli strain DH5aTM. The E. coli cultures are routinely cultured at 37 C on Luria-Bertani (LB) agar on or in LB broth containing Ampicillin (30 µg/ml) or Carbenicillin (50 µg/ml broth, 100 µg/ml agar). E. coli strains are usually preserved in stab agar or glycerol for mid-term storage and lyophilized for long-term storage. - [Read Maintenance of Probes in Bacteria Including Escherichia coli Protocol]
Protocol describes how isolated nuclei are incubated with varying amounts of Dnase I. Genomic DNA is then isolated from the nuclei and digested with a restriction enzyme, analyzed by gel electrophoresis, and probed by Southern hybridization. - [Read Mapping Dnase-I-hypersensitive Sites Protocol]
In MOPAC, the amino-terminal and carboxy-terminal sequences of a peptide are used to design two redundant families of oligonucleotides encoding the aminoand carboxy-terminal sequences of the peptide. The primers are used either to amplify a segment of cDNA prepared by RT-PCR from a tissue known to express the protein or to amplify a segment of DNA from an established genomic or cDNA library. - [Read Mixed Oligonucleotide-primed Amplification of cDNA MOPAC Protocol]
Protocol is used to establish conditions for restriction enzyme digestion of eukaryotic genomic DNA that will generate fragments of a size appropriate for construction of genomic libraries. To construct a genomic library, the average length of the starting genomic DNA should be at least eight times the capacity of the vector. - [Read Partial Digestion of Eukaryotic DNA for Use in Genomic Libraries: Pilot Reactions Protocol]
PCR Tips and Tricks - General Guidelines and Troubleshooting PCR polymerase chain reaction. The Genomic Variation Laboratory, U.C Davis - [Read PCR Tips and Tricks]
PCR Tips and Tricks- http://genome-lab.ucdavis.edu/Protocols/pcr_tips/pcr_tips_and_tricks.htm
PCR Tips and Tricks - General Guidelines and Troubleshooting PCR polymerase chain reaction. The Genomic Variation Laboratory, U.C Davis - [Read PCR Tips and Tricks]
Protocol for preparation of DNA for pulsed-field gel electrophoresis: isolation of DNA from mammalian cells and tissues. Genomic DNAs from mammalian cells are prepared for pulsed-field gel electrophoresis by lysing cells in situ in an agarose plug. Following digestion with an appropriate restriction enzyme, the plug is loaded directly into the well of a pulsed-field gel or it can be melted before loading. - [Read Preparation of DNA for Pulsed-field Gel Electrophoresis: Isolation of DNA from Mammalian Cells]
Method is used chiefly to genotype transgenic and knockout mice. Each 6-10-mm snippet of mouse tail yields 50-100 µg of DNA that can be used in dot or slot blotting to detect a transgene of interest, in Southern hybridization to detect DNA fragments that are <20 kb in size, and as a template in PCRs. - [Read Preparation of Genomic DNA from Mouse Tails and Other Small Samples Protocol]
Simple protocol is used to extract DNA from small numbers of cultured cells and from fragments of soft or bony tissues. The method is used chiefly to genotype transgenic and knockout mice. Each 6-10-mm snippet of mouse tail yields 50-100 µg of DNA that can be used in dot or slot blotting to detect a transgene of interest, in Southern hybridization to detect DNA fragments that are <20 kb in size, and as a template in PCRs. - [Read Preparation of Genomic DNA from Mouse Tails and Other Small Samples Protocol]
This method is used to isolate genomic yeast DNA or shuttle plasmids that replicate in both S. cerevisiae and E. coli. The DNA can be used as a template for PCR and for transformation. - [Read Rapid Isolation of Yeast DNA Protocol]
Protocol is the second in a set of three, describing fluorescent mRNA differential display (FDD or FDDRT-PCR). For the purposes of FDD gene expression analysis, as well as any other RNA-based gene expression technologies, contaminating genomic DNA must be removed before reverse transcription and subsequent PCR. - [Read Removal of Genomic DNA from Total RNA for Use in Fluorescent mRNA Differential Display Protocol]
Protocol for restriction endonuclease digestion of DNA in agarose plugs. Genomic DNA isolated from mammalian, yeast, or bacterial cells can be digested with restriction endonucleases by incubating agarose plugs containing the DNA in the presence of the desired enzyme. After digestion, the DNA can be fractionated by pulsed-field gel electrophoresis and either isolated from the gel or analyzed by Southern Hybridization. - [Read Restriction Endonuclease Digestion of DNA in Agarose Plugs Protocol]
Restriction landmark genomic scanning (RLGS) is a method to detect large numbers of restriction landmarks in a single experiment. It is based on the concept that restriction enzyme sites can serve as landmarks throughout a genome. RLGS uses direct end-labeling of the genomic DNA digested with a rare-cutting restriction enzyme and high-resolution two-dimensional electrophoresis. - [Read Restriction Landmark Genomic Scanning Protocol]
DNA isolation method yields an average of 0.6 micrograms of genomic DNA that is suitable for Southern analysis or PCR. Starting with fresh mycelium, 20 to 40 samples can be processed in approximately two hours. Better yields (about 5 micrograms) may be obtained by suspending approximately 100 microliters of ground lyophilized mycelium in 500 microliters of isolation buffer and following the protocol. - [Read Small Scale DNA Preps for Neurospora crassa Protocol]
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.
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.