The procedure is to mutagenize a large population of worms with trimethylpsoralen and UV irradiation, set up 1152 subpopulations, screen DNA made from this library for deletions in specific genes by nested PCR, and then to recover single worms carrying the deletions through a sib-selection process. - [Read C. elegans Gene Knockout Protocol]
Preparation of primary mouse embryonic fibroblasts, Preparation of mitotically inactive mouse embryo fibroblasts, Irradiation of the MEFs. Nederlands Kanker Instituut Teriele. - [Read MOUSE EMBRYONIC FIBROBLASTS PDF]
This protocol describes the preparation of feeder cells from MEF cells or from the STO mouse fibroblast cell line. The cells are rendered mitotically inactive by treatment with {gamma}-irradiation. The feeder layers can then be used to maintain embryonic stem (ES) cells in the undifferentiated state. - [Read Preparing Feeder Cell Layers from STO or Mouse Embryo Fibroblast (MEF) Cells Protocol]
Protocol describes the transfer of RNA from agarose gels to neutral or positively charged nylon membranes, using upward capillary flow of neutral or alkaline buffers. RNA becomes covalently fixed to positively charged nylon membranes during transfer in alkaline buffers. However, treatment by UV irradiation or heating is required to fix RNA to neutral membranes. - [Read Transfer and Fixation of Denatured RNA to Membranes Protocol]
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]