percentage Protocols

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: Tetrahymena Protozoa Protocols

Mature Tetrahymena cells of opposite mating types are starved under appropriate salt conditions. The mating types are then combined to costimulate through cell-cell interaction. Loose pairs and then firm, irreversible pairs of cells of opposite mating types form. This method consistently results in a high percentage of pairing (usually greater than 80%) and good synchrony. - [Read Induction of Conjugation in Tetrahymena 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: Nucleic Acid Electrophoresis Protocols: Pulsed Field Gel Electrophoresis Protocols

Protocol for retrieval of DNA fragments from pulsed-field gels following DNA concentration. DNA contained in a slice of low-melting-temperature agarose is first concentrated by electrophoresis into a high-percentage agarose gel, and then isolated by treatment with agarase.  The resulting DNA preparation is purified by microdialysis. - [Read Retrieval of DNA Fragments from Pulsed-field Gels following DNA Concentration Protocol]

Category: Cell Biology and Cell Culture: Cell Cycle Protocols: Mitosis Protocols

Protocol describes a method for synchronizing monolayer cells in mitosis using selective detachment from their substrate. During mitosis, cells become spherical, causing them to become more loosely attached to their substrate. The "rounded up" cells are selectively detached by tapping the culture flask, resulting in a population in which as many as 90-98% of the cells are in mitosis. The drug nocodazole is used to increase the percentage of cells undergoing mitosis before detachment is performed - [Read Synchronization of Mammalian Cell Cultures in Mitosis Using Selective Detachment Protocol]

Category: Cell Biology and Cell Culture: Flow Cytometry Protocols: Cell Cycle Analysis Protocols

This protocol describes a method for synchronizing monolayer cells in mitosis using selective detachment from their substrate. During mitosis, cells become more spherical, causing them to become more loosely attached to their substrate. The "rounded up" cells are selectively detached by tapping the culture flask, resulting in a population in which as many as 90-98% of the cells are in mitosis. The drug nocodazole is used to increase the percentage of cells undergoing mitosis before detachment.. - [Read Synchronization of Mammalian Cell Cultures in Mitosis Using Selective Detachment Protocol]

Category: Drosophila Protocols: Drosophila Genetics Protocols

Protocol describes the general procedure for creating mutations in the DNA of Drosophila by exposure to X-rays. Irradiation of cells with X-rays creates double strand breaks (DSBs) in DNA. Mutations introduced in the DNA of germ line cells (sperm) are propagated by mating the exposed males to virgin females. The progeny of this cross can be mated to each other so that a percentage of the subsequent offspring will have two copies of the same mutant allele. - [Read X-Ray Mutagenesis of Drosophila Protocol]