Amplification of cosmid libraries may result in distorted representation of cloned genomic sequences and should be avoided wherever possible. In this method of amplification, distortion of the library is rarely a problem because at no stage are bacteria containing different recombinant cosmids grown in competition with one another. - [Read Amplification and Storage of a Cosmid Library: Amplification on Filters Protocol]
An Integrative Procedure for Apoptosis Identification and Measurement. Yingyu Cui Lab/Group: National Key Laboratory of Protein Engineering and Plant Genetic Engineering, College of Life Sciences. I have uploaded an integrative procedure through which a relatively satisfactory result can be obtained following a single stage of cell culture and transient cell treatment, then detection with different instruments. This shortens experiment time. - [Read An Integrative Procedure For Apoptosis Identification And Measurement]
An integrative procedure through which a relatively satisfactory result can be obtained following a single stage of cell culture and transient cell treatment, then detection with different instruments. This shortens experiment time. - [Read Apoptosis Identification and Measurement Protocol]
Protocol describes the purification of mouse T cells, B cells, and T cell subsets using magnetic bead separation. Isolation of cell subsets using magnetic beads is quick, simple, and reliable and can result in high yields of very pure cells. - [Read Fractionation of T and B Cells Using Magnetic Beads Protocol]
Protocol describes the purification of mouse T cells, B cells, and T cell subsets using magnetic bead separation. Isolation of cell subsets using magnetic beads is quick, simple, and reliable and can result in high yields of very pure cells. - [Read Fractionation of T and B Cells Using Magnetic Beads Protocol]
There are several strategies to visualize the antibody. For transmitted light microscopy, color development substrates for enzymes are often used. The antibody can be directly
labeled with the enzyme. However, such a covalent link between an antibody and an enzyme might result in a loss of both enzyme and antibody activity. For these reasons
several multistep staining procedures have been developed, where intermediate link antibodies are used. In this protocol use the Vectastain ABC-kit. - [Read Immunocytochemistry in Free-Floating Sections Protocol]
This method for tagging monoclonal antibodies involves growing hybridomas in the presence of radioactive amino acids. This protocol can be particularly useful when conventional labeling techniques cause the antibody to lose activity. The labeled antibodies that result are essentially identical to the unlabeled antibodies. - [Read Labeling Monoclonal Antibodies by Biosynthesis Protocol]
Cells incorporate 35S-methionine or cysteine during the protein synthesis. Thus it is essential to use Met,Cys-free medium and dialyzed FCS during the labeling. Short period of incubation with 35S-methionine or cysteine will result in radiolabeling (pulse), and additional incubation with excess concentration of unlabeled Met+Cys (chase) is needed for complex glycoproteins like integrins to get expressed as a maturated form. - [Read Metabolic Labeling & Immunoprecipitation Protocols]
For both biological and economical reasons, it is important to eliminate mycoplasmas from cell cultures being used for basic research, diagnosis, and biotechnological production. The most commonly used method for elimination, inactivation, or suppression of mycoplasmas in cell cultures is treatment with antibiotics. In general, antibiotic therapies do not result in long-lasting, successful elimination. Also, the cytotoxic properties of antibiotics can cause undesirable side effects on cells. - [Read Mycoplasma Elimination Reagent Protocol]
A powerful way to identify a mutation in the gene of interest and to test mutant plants for phenotypes that are predicted to result from loss of function of that gene is by PCR screening. Pools of insertion lines are screened using one primer corresponding to the gene of interest and one primer corresponding to the end of the insertion element. The synthesis of a product indicates the presence of an insertion in the gene of interest. - [Read Screening DNA Pools for T-DNA Insertions in Arabidopsis Genes Protocol]
Unlike spherical phage, such as T4 and λ, which have roughly equal weight ratios of protein to DNA, filamentous phage have about six times more protein than DNA; the protein therefore contributes substantially to the absorption spectrum.
The DNA Ligation protocol described here contains the steps required to join together using ligase enzyme both plasmid DNA and insert DNA fragments in order to create a new plasmid. This new ligated plasmid can be transformed after into competent bacteria to produce DNA for mini, midi or maxi-prep isolation.