host Protocols

Category: Epigenetics and Methylation Protocols

The pattern and extent of DNA methylation can significantly affect the success of restriction digestions or bacterial transformations. Prokaryotic DNA may be methylated by host restriction/modification systems, while eukaryotic DNA often is methylated i - [Read A practical guide to DNA methylation Promega PDF]

Category: Immunology: Antigen

Antigen Design and Sera Purification. Custom antisera. Sigma Aldrich. Peptide Selection and Design, Coupling Strategy # Selecting the Protein Carrier, Multiple Antigenic Peptides (MAPs), Choice of Host, Adjuvant, Immunization, & Sera Collection, Antisera Purification, Ammonium Sulfate Precipitation, Protein A/G, Immunoaffinity Purification. - [Read Antigen Design and Sera Purification]

Category: Reporter Gene Assays: B-Galactosidase Assay Protocols

This assay is used when working with phage vectors carrying the beta-gal gene. If the cloning event disrupts a normally functional copy of the gene in the vector the resulting plaques would appear clear in the assay. If the phages contain a functional beta-gal gene they will form blue rings around their plaques. Any strain which is not an overproducer of beta-gal will work as indicator host bacteria; a single chromosomal copy of the gene is not a problem. - [Read Assay for Phage Containing the Beta-galactosidase Gene]

Category: Yeast Protocols: Yeast Genetics Protocols: B-Galactosidase Assay Protocols

This assay is used when working with phage vectors carrying the beta-galactosidase gene (often used for immunological screening). If the cloning event disrupts a normally functional copy of the gene in the vector the resulting plaques would appear clear in the assay. If the phages contain a functional beta-galactosidase gene they will form blue rings around their plaques. Any strain which is not an overproducer of beta- galactosidase will work as indicator host bacteria. - [Read Assay for Phage Containing the Beta-galactosidase Gene Protocol]

Category: Plant Biology Protocols: Plant Genetics Protocols

Virus-induced gene silencing (VIGS) uses a virus to deliver a sequence from a gene of interest into a host plant. The virus carrying the fragment of the gene of interest must be capable of replication if dsRNA is to be produced. One or two leaves are inoculated with Agrobacterium strains carrying the VIGS vector possessing the gene fragment. The virus then replicates and spreads throughout the plant, mediating silencing. - [Read Delivery of dsRNA into Plants by VIGS Methodology]

Category: Cell Organelle Protocols: Subcellular Fractionation Protocols

Acidocalcisomes, the dense acidic calcium-storing organelles, which were originally identified in Trypanosoma cruzi, have no parallels in mammalian cells. They thus represent a unique functional characteristic, not shared by the host and hence offer an important potential target for chemotherapy of Chagas disease. - [Read Fractionation of Acidocalcisomes and Other Organelles from Trypanosoma, Leishmania, Chlamydomonas]

Category: Immunohistochemistry Protocols

Immunostaining conditions. Includes: Antibody, Host, Source, Cat #, Antigen Retrieval, Block, Diluent, Ab Dilution and 2° antibody. - [Read Immunostaining Conditions]

Category: Viral Culture and Isolation Protocols: Viral Culture Protocols

When an individual bacterial virus grows in a bacterial host suspended in a top agar lawn, its progeny infect and lyse the surrounding host cells. This causes the appearance of a "hole" or plaque in the otherwise homogeneous bacterial lawn. Since each plaque represents a single virus, the number of viruses in the aliquot added to the plate is equal to the number of plaques which appear. - [Read Titering of Bacterial Viruses Protocol]