colonies Protocols

Category: Yeast Protocols: Yeast Nucleic Acid Protocols: Yeast PCR Protocols

Yeast colonies are suspended in complete PCR buffer and transferred to a thermal cycler for 35 cycles of PCR. The products of the amplification reaction are analyzed by gel electrophoresis. - [Read Analyzing Yeast Colonies by PCR Protocol]

Category: PCR Protocols: Colony PCR

Identification of Bacterial Colonies using PCR. Colony PCR Method and Technique. Maddock Lab, The University of Michigan. - [Read Colony PCR]

Category: Stem Cell Protocols

This protocol decribes derivation of TS cell lines from 3.5-days post coitum (dpc) mouse blastocysts. The procedure is similar to the derivation of embryonic stem (ES) cell lines. However, the success rate is considerably higher, and less expertise is required to recognize pluripotent TS cell colonies. - [Read Derivation of Trophoblast Stem (TS) Cell Lines from Blastocysts Protocol]

Category: Yeast Cell Culture Protocols: Yeast Sporulation Protocols

Direct method for determining efficiency in yeast. The plating efficiency of a strain is a measure of the percentage of cells in a culture that are capable of forming colonies (colony forming . - [Read Determining Plating Efficiency in Yeast: Direct Method]

Category: Bacterial Cell Culture Protocols: Bacterial Plating Protocols

Protocol for the examination of bacterial colonies. - [Read Examination of Bacterial Colonies Protocol]

Category: Bacterial Cell Culture Protocols

Protocol for examination of bacterial colonies. - [Read Examination of Bacterial Colonies Protocol]

Category: Stem Cell Protocols: Stem Cell Isolation Protocols

This protocol describes a method for freezing ES cells in 96-well plates after ES colonies have been isolated by picking. - [Read Freezing Embryonic Stem (ES) Cells in 96-Well Plates Protocol]

Category: Genetics and Genomics: Genotyping Protocols: PCR Genotyping

This protocol describes a rapid PCR-based method for identifying targeted ES cell colonies prior to picking. It is based on DNA analysis of a small part of colonies pooled directly from selection plates. Only positive colonies are expanded. - [Read Genotyping Embryonic Stem (ES) Cell Colonies Prior to Picking Protocol]

Category: Stem Cell Protocols: Stem Cell Isolation Protocols

This protocol describes a method for isolating individual ES cell colonies by picking after they have grown on selective medium. - [Read Isolating Individual Embryonic Stem (ES) Cell Colonies by Picking Protocol]

Category: Bacterial Protocols

Alkali is used to liberate DNA from bacterial colonies on nitrocellulose or nylon filters. The DNA is then fixed to the filter by UV-cross-linking or baking under vacuum. - [Read Lysing Colonies and Binding of DNA to Filters Protocol]

Category: RNA Protocols: cDNA Libraries Library

Purpose: To transfer DNA from bacterial colonies to nylon (or nitrocellulose) membrane so that a library can be screened by hybridization. Jim Howe Donis Keller Lab - [Read Method: Transfer of DNA from Bacterial Colonies to Nylon Membrane or Nitrocellulose]

Category: Stem Cell Protocols

This protocol describes passage of ES cells. They should be split at 1:3 to 1:7 every 2-3 days depending on their growth rate when they reach 70% confluency. They should never be allowed to grow past 90% confluency, but rather they should form tightly packed colonies not touching each other. - [Read Passage of Embryonic Stem (ES) Cells Protocol]

Category: Bacteria Genetics Protocols

Protocol describes a method to determine the presence of plasmid DNA in an Agrobacterium culture. Compared to selection of transformed Agrobacterium, which can be ambiguous and normally takes several days for resistant colonies to appear, the approach described here is both rapid and accurate. - [Read PCR Analysis of Agrobacterium Protocol]

Category: Cloning Protocols: Vector Protocols

To minimize self-ligated vector in your transformation, treat your linearized vector with a phosphatase to remove the 5' phosphates necessary for ligation. This should improve the percentage of colonies with inserts. - [Read Phosphatase Treatment of Linearized Vector Protocol]

Category: Yeast Protocols: Yeast Transformation Protocols

Protocol for plasmid transformation of Yeast colonies. Protocol can be used if high efficiency is not needed. - [Read Plasmid Transformation of Yeast Colonies Protocol]

Category: Bacteria Transformation Protocols

Protocol generates competent cultures of E. coli that can be transformed at high frequencies (5 x 108 transformed colonies/µg of superhelical plasmid DNA). - [Read Preparation and High-efficiency Transformation of Competent E. coli]

Category: E Coli Protocols: E coli Transformation Protocols

Procedure generates competent cultures of E. coli that can be transformed at high frequencies (5 x 108 transformed colonies/µg of superhelical plasmid DNA). IMPORTANT All steps in this protocol should be carried out aseptically. - [Read Preparation and Transformation of Competent E. coli Protocol]

Category: Bacteria Transformation Protocols

Protocol used to prepare batches of competent bacteria that yield 5 x 106 to 2 x 107 transformed colonies/µg of supercoiled plasmid DNA. - [Read Preparation and Transformation of Competent E. coli Using Calcium Chloride Protocol]

Category: E Coli Protocols: E coli Transformation Protocols

Protocol is is used to prepare batches of competent bacteria that yield 5 x 106 to 2 x 107 transformed colonies/µg of supercoiled plasmid DNA. - [Read Preparation and Transformation of Competent E. coli Using Calcium Chloride Protocol]

Category: Bacteria Transformation Protocols

Protocol reproducibly generates competent cultures of E. coli that yield 1 x 108 to 3 x 108 transformed colonies/µg of plasmid DNA. The protocol works optimally when the bacterial culture is grown at 18°C. If a suitable incubator is not available, a standard bacterial shaker can be set up in a 4°C cold room and regulated to 18°C. - [Read Preparation and Transformation of Competent E. Coli: "Ultra-Competent" Cells Protocol]

Category: E Coli Protocols: E coli Transformation Protocols

Protocol reproducibly generates competent cultures of E. coli that yield 1 x 108 to 3 x 108 transformed colonies/µg of plasmid DNA. The protocol works optimally when the bacterial culture is grown at 18°C. If a suitable incubator is not available, a standard bacterial shaker can be set up in a 4°C cold room and regulated to 18°C. - [Read Preparation and Transformation of Competent E. Coli: "Ultra-Competent" Cells Protocol]

Category: Viral Culture and Isolation Protocols: Viral Culture Protocols

In this protocol, a bacterial lysogen is constructed from a recombinant bacteriophage {lambda} encoding a fusion protein of interest. The resulting lysogenic colonies are induced to synthesize the fusion protein, which is then isolated in preparation for functional and biochemical analyses. - [Read Preparation of Lysates Containing Fusion Proteins Encoded by Bacteriophage {lambda} Lysogens]

Category: Nucleic Acid Purification Protocols: DNA Isolation Protocols: DNA Plasmid Preps Protocols

Plasmid DNA is prepared directly from bacterial colonies plucked from the surface of agar media with toothpicks. - [Read Preparation of Plasmid DNA: Toothpick Minipreparation Protocol]

Category: PCR Protocols: PCR Cloning Protocols

In this protocol sequences cloned in standard bacteriophage or plasmid vectors are amplified in PCRs containing primers targeted to flanking vector sequences.  The amplified fragments can be analyzed by gel electrophoresis, DNA sequencing, and/or restriction mapping.  Many colonies or plaques can be assayed simultaneously. - [Read Rapid Characterization of DNAs Cloned in Prokaryotic Vectors Protocol]

Category: Cell Culture Protocols: Cell Culture Contamination Prevention and Removal Protocols

This method is advantageous for saving the occasional cultures that become contaminated. Yeast contaminated cultures will appear cloudy when slightly shaken and lymphocytes will not cluster together as much as normal. If cultures are suspect, a drop of culture can be streaked on a YPD media plate to check for growth of yeast colonies, or a 5 ml sample can be taken to Barnes Diagnostic Center for identification of yeast strain. - [Read Removal of Yeast Contamination from Lymphoblast Cultures Protocol]